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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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  • ThesisItemOpen Access
    Isolation, characterization and morpho-biometric evaluation of pre-pubertal porcine spermatogonial stem cells in different culture media
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-03) Lalmasawma, Timothy; Das, Arpana
    Testes samples were collected from 7-15 days old pre-pubertal male crossbred piglets (Local × Hampshire) for isolation, enrichment and in vitro culture of porcine spermatogonial stem cells (SSCs). Isolation of spermatogonial stem cells like cells was performed by double enzymatic digestion using four enzymes viz., collagenase, DNase I, hyaluronidase type II and trypsin-EDTA. Isolated cells were further enriched by differential plating and percoll density gradient centrifugation method. Enriched cells were cultured on Sertoli cell feeder layer in three different culture media. All the three media consisted of same concentration of DMEM, NEEA, L-glutamine, FBS, EGF and FGF, however in addition to these, LIF was added to media I, GDNF was added to media II and both LIF and GDNF were added to media III. Characterization of SSCs was done by alkaline phosphatase and immunoflourescence staining. Expression of SSC specific pluripotent marker genes by putative SSCs was also studied by RT-PCR study. Porcine SSCs were observed as dome shaped round or oval bodies on 5th -6th day of culture in all the three media. Clustering of cell was observed from 4th -5th day of culture and single, paired or multiple colonies were observed from 8-10th day of culture. The SSCs colonies appeared as mulberry, grape or rosette shaped with irregular distinct boundary from feeder layer on 15th - 19th day of culture in all the three media. However, the shape of the SSCs was found to be distorted with increase in the days of culture. The morphology of the SSC colonies was maintained best up to 30th day of culture in media III. The SSC colony number was recorded as 82.14 ± 2.91, 60.07 ± 2. 78 and 48.43 ± 1.96 on 5th, 15th and 30th day of culture respectively in media I. The corresponding numbers were 91.71 ± 2.62, 67.00 ± 2.05 and 57.29 ± 2.17 in media II and 105.93 ± 2.82, 80.21 ± 2.45 and 62.50 ± 2.09 in media III respectively. The SSC colony diameter was found to be 64.26 ± 0.85, 125.30 ± 1.88 and 123.01 ± 5.49μm on 5th, 15th and 30th day of culture respectively in media I. The corresponding values were 69.67 ± 1.12, 139.58 ± 3.93 and 142.08 ± 5.72μm in media II and 76.49 ± 1.61, 152.55 ± 4.07 and 172. 08 ± 4.96μm in media III respectively. The day of culture and culture media had significant effect (P≥0.01) on SSC colony number and significantly higher number of SSC colony was observed on day 5 and lower was on day 30 of culture in all the three media. The SSC colony number was significantly higher in media III containing both GDNF and LIF. The diameter of SSC colony differed significantly (P≥0.05) due to day of culture and culture media. The interaction between day of culture and culture media was also significant (P≥0.01). The colony diameter recorded on day 30 of culture was significantly higher, whereas lower number was recorded on day 5 of culture in all the culture media. Diameter of SSC colony obtained in media III was found to significantly higher and the lower diameter was obtained in media I on all the day of culture. It was observed that the SSC colony number decreased and colony diameter increased with the day of culture from day 5th to 30th day of culture in all the media.The putative SSCs in all the three media showed positive result for alkaline phosphatase and immunofluorescence staining. The putative SSCs in all the three media were also found to express SSC specific pluripotent marker genes viz., OCT4, SOX2, NANOG and maximum expression was observed in media III, however, no expression was recorded for c-KIT and PPARγ which were known to be the markers for differentiated SSCs. BAX4, an apoptopic marker gene was also expressed by putative SSCs in all the three media. Based on the findings of the present study, it may be concluded that a pure population of porcine spermatogonial stem cells (SSCs) could be obtained and successfully maintained in vitro up to 30th day of culture. Media III containing DMEM, FBS, NEAA, L-glutamin, FGF, EGF, LIF and GDNF was found to be the best for in vitro culture of porcine SSCs.
  • ThesisItemOpen Access
    Phenotypic characterization and polymorphism study of prolactin gene in native geese of Assam
    (2022) Gogoi, Ankita; Das, Bula
    Data pertaining to 1015 native geese of Assam were considered for morphometric characteristics, productive and reproductive performances, egg quality and carcass traits, along with screening of polymorphisms in 5'flanking region of Prolactin gene. Two plumage colours, cinnamon (62.38%) and white (37.62%) were seen. Bill colour was observed to be black (49.08%), orange (35.33%,), yellow (13.24%) and mixture of black and orange (2.35%). The skin was 100% white. Shank and feet colour were orange (75.32%), yellow (21.67%) and mixture of black and orange colour (3.01%). Black (60.14%), brown (28.49%) and blue (11.37%) eye colour was seen. The overall LSM ± SE for body weights at hatching, 4 week, 8 week, 6 month, 8 month,12 month of age were 89.85±0.11, 66.89±1.21, 1761.90±2.08, 3305.42±4.63, 3575.80±10.61 and 3804.84±3.91 g, respectively. The overall mean (cm) for bill length, bill width, knob diameter (at 12 months of age), head length, head width, neck length, neck girth, breast length, keel length, body length, body circumference, shank length and wingspan (3 to 6, 8 to 10 and 12 months of age) at the respective ages were 5.31 ± 0.018, 6.24 ± 0.01, 7.24 ± 0.012, 8.42 ± 0.014; 1.46 ± 0.010, 1.95 ± 0.008, 2.19 ± 0.009, 2.45 ± 0.009; 2.34 ± 0.006; 5.42± 0.019, 6.70 ± 0.018, 8.31 ± 0.019, 10.26 ± 0.018; 2.44 ± 0.009, 2.80 ± 0.011, 3.03 ± 0.010, 3.26 ± 0.012; 14.13 ± 0.031, 16.00 ± 0.032, 17.80 ± 0.026, 21.74 ± 0.027; 2.17 ± 0.012, 4.12 ± 0.013, 6.28 ± 0.011, 10.19 ± 0.019; 7.95 ± 0.022, 15.73 ± 0.044, 21.42 ± 0.023, 29.93 ± 0.022; 10.93 ± 0.024, 12.62 ± 0.023, 14.34 ± 0.025; 35.89 ± 0.049, 39.82 ± 0.040, 42.36 ± 0.043, 48.21 ± 0.037; 33.03 ± 0.033, 43.74 ± 0.06, 45.59 ± 0.033, 49.92 ± 0.029; 5.23 ± 0.015, 6.10 ± 0.016, 7.30 ± 0.015, 8.36 ± 0.015 and 89.89 ± 0.038, 101.54 ± 0.038 and 114.12 ± 0.037, respectively. Significant effects (P<0.01) of district and sex of bird on body weight and morphometric traits were observed. Age at first lay, annual egg production, clutch size and clutch interval were 323.02±0.302 days, 21.51±0.180 numbers, 9.87±0.098 numbers and 64.48±0.655 days, respectively. Two laying cycles, viz., September to October and December to February were observed. Egg weight, shell weight, shell thickness, shape index and specific gravity were 117.00±1.395 g, 14.19±0.225 g, 0.54±0.006 mm, 72.22±0.283 % and 1.09±0.001, respectively. Albumen Index, Haugh Unit, Yolk Index and yolk weight were 0.06±0.001, 59.79±0.726, 0.34±0.007 and 61.98±1.045, respectively. Age at slaughter (days), pre-slaughter weight (g), shrinkage (%), dressing percentage (%), evisceration loss (%) and ready to cook yield (%) in gander were 411.40 ± 4.26, 4192.80 ± 69.87, 4.36 ± 0.05, 67.10 ± 1.14, 7.58 ± 0.58 and 70.43 ± 1.05, respectively. The corresponding values in geese were 338.00 ± 21.48, 3878.40 ± 36.06, 4.76 ± 0.32, 66.11 ± 1.01, 7.02 ± 0.73 and 70.28 ± 1.24. In gander, yield of cut up parts on live weight (%) were 17.62 ± 0.19, 7.68 ± 0.14, 6.58 ± 0.10, 13.56 ± 1.29, 4.62 ± 0.12 and 8.05 ± 0.21 for breast, drumstick, thigh, back, neck and wings respectively. The corresponding values on dressed weight (%) were 27.49 ± 0.56, 11.98 ± 0.29, 10.26 ± 0.13, 21.01 ± 1.66, 7.21 ± 0.23 and 12.55 ± 0.25, respectively. In geese, cut up parts yield to live weight (%) were 17.58 ± 0.28, 6.74 ± 0.14, 6.71 ± 0.10, 12.40± 0.50, 4.35 ± 0.16 and 7.87 ± 0.33 for breast, drumstick, thigh, back, neck and wings, respectively. The corresponding values as per dressed weight (%) were 27.94 ± 0.42, 10.71 ± 0.19, 10.67 ± 0.16, 19.67 ± 0.43, 6.93 ± 0.33 and 12.48 ± 0.41, respectively. Meat to bone ratio of 2.05 ± 0.01 was found in both the sexes. 100 percent broody behavior observed. Fertility and hatchability (TES) were 91.38 ± 6.83 and 86.50 ± 7.59%. Mortality rate were 22.58, 15.24 and 11.72 at 0 to 1, 1 to 8 and 8 to 20 weeks. Screening for polymorphism in 5'-flanking region of PRL revealed transversion of G to C at location 117 and transition of C to T at location 182.The native geese attained much higher body weight at 6 months and 12 months of age compared to other poultry species. Various studies may be undertaken to genetically characterize the goose populations and association studies of genes with production traits may be conducted. Geese have promising role as alternate species for backyard poultry meat production. The detailed study would help in development of breed descriptors and baseline reference for future studies.
  • ThesisItemOpen Access
    STUDIES ON SWAMP BUFFALOES OF ASSAM UNDER FARM AND FIELD CONDITION
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2020-12) SARMA, MOMI; Das, G. C.
    The present investigation was conducted to study some of the morphometric, production & reproduction and milk constituent traits of swamp buffaloes of Assam under farm and field condition. Accordingly, the required data for farm animals were collected from the records maintained at the buffalo farm under Network project on swamp buffaloes of Assam, College of Veterinary Science, A.A.U. Khanapara and Government Livestock Farm, Department of A.H. & Vety., Govt. of Assam, Barhampur, Nagaon. The data for field animals were collected from different buffalo khutis located at Dhemaji, North Lakhimpur and Sivasagar districts of Assam through field survey by providing questionnaire as well as through personal interviews with the farmers. For morphometric traits, the measurements were made on adult buffaloes using standard measuring tape at farm as well as at field. For milk constituents milk samples of swamp buffaloes were collected randomly from farm as well as from field and were tested using Milk Analyzer, LAKTAN 1-4 (Model: 220). For morphometric traits 62 numbers of swamp buffaloes from Khanapara buffalo farm, 21 numbers from Barhampur buffalo farm and 224 numbers from field were considered. Out of 224 animals, 146 from Dhemaji and North Lakhimpur districts (north bank) and78 from Sivasagar district (south bank) were measured. For production and reproduction traits 1056 lactation records, of which 208 lactation records pertaining to 52 no. of animals from Khanapara buffalo farm and 848 lactation records pertaining to 212 no. of animals from field (buffalo khutis) covering all the three districts were considered. A total of 172 milk samples, out of which 46 samples from Khanapara farm and 126 from Dhemaji, North Lakhimpur and Sivasagar districts of Assam were tested for various milk constituents. The body measurement traits include body length, height at withers, heart girth and the pouch girth. The overall least-squares means (μ) for the body length, height at withers, heart girth and pouch girth were found to be 108.881 ± 1.448 cm, 126.793 ± 1.378 cm, 172.630 ± 2.608 cm and 174.760 ± 2.422 cm, respectively. Significant (P<0.05) effect of the two locations under study was observed in case of all the body measurement traits viz., body length, heights at withers, heart girth and pouch girth. Significant (P<0.05) effect of sex was seen for all the body measurement traits viz., body length, heights at withers, heart girth and pouch girth. Male buffaloes were observed to show higher values for all the traits of body measurements than the females. The head measurement traits include head length and eye to eye space. The overall least-squares means (μ) for the head length and eye to eye space was found to be 43.746 ± 0.772 cm and 15.125 ± 0.314 cm, respectively. Significant (P<0.05) effect of the two locations under study was observed in case of head length. Significant (P<0.05) effect of sex was seen on both the traits of head measurements viz., head length and eye to eye space. Male animals have shown higher values for both the traits of head measurements than the females. The least-squares means (μ) for the ear length was found to be 21.498 ± 0.287 cm. The horn measurement traits include circumference of horns at base, horn length, space between two horns at base and space between two horns at tips. The overall least-squares means (μ) for the circumference of horns at base and horn length was found to be 18.975 ± 0.491 cm and 43.312 ± 0.934 cm, respectively. While the overall least-squares means (μ) for the space between two horns at base and space between two horns at tips were found to be 16.293 ± 0.316 cm and 37.118 ± 0.807 cm. Significant (P<0.05) effect of sex was observed in case of horn length and space between two horns at base. Male buffaloes have shown higher values for the horn measurement traits. The tail measurement traits include length of tail and length of switch of tail. The overall least-squares means (μ) for the length of tail and length of switch of tail were found to be 69.956 ± 0.913 cm and 13.625 ± 0.298 cm. Significant (P<0.05) effect of sex was observed in case of length of tail. Male buffaloes have shown higher value for the length of tail than the female buffaloes. For colour characteristics, coat colour, horn colour and tail switch colour was included. Coat colour was predominantly grey (98.58%) with few white (albino) (1.52 %) was observed. For horn colour, black colour was observed in all the observations. For tail switch colour two variants were observed viz., black in 86.65 % observation and brown in 13.35% observation. The least-squares means (μ) for first lactation milk yield and for first lactation length was found to be 449.379 ± 5.517 kg and 239.443 ± 5.845 days, respectively. Highly significant effect (P˂ 0.01) of location on first lactation milk yield was observed. The least-squares means (μ) for first peak yield and for days to attain first peak yield was found to be 2.810 ± 0.016 kg and 59.204 ± 3.167 days, respectively. Significant influence (P˂ 0.05) of season of calving was observed on days to attain peak yield. The least-squares means (μ) for the age at first calving was found to be 53.714 ± 2.269 months. The least-squares means (μ) for first gestation length and first dry period were found to be 308.549 ± 1.444 days and 246.913 ± 6.452 days, respectively. Significant influence (P˂ 0.05) of sex of calf was observed on first gestation length. Highly significant influence (P˂ 0.01) of location was observed on first dry period. Significant influence (P˂ 0.05) of season of calving and sex of calf was observed on first dry period. The overall least-squares means (μ) for first service period and first calving interval were found to be 178.042 ± 5.852 days and 486.533 ± 6.879 days, respectively. Highly significant influence (P˂ 0.01) of location was observed on service period. Significant influence (P˂ 0.05) of season of calving and sex of calf was observed on first service period. Significant influence (P<0.05) of location was observed on first calving interval. The least-squares means (μ) for birth weight was found to be 29.441 ± 2.446 kg. The least-squares means (μ) for lactation milk yield and lactation length was found to be 453.654 ± 6.715 kg and 243.847 ± 6.394 days, respectively. Highly significant influence (P˂ 0.01) of location and order of lactation were observed on both lactation milk yield and lactation length. The overall least-squares means (μ) for peak yield was found to be 2.951 ± 0.035 kg and days to attain peak yield was found to be 59.626 ± 4.591 days. Highly significant influence (P˂ 0.01) of location was observed on days to attain peak yield. Highly significant influence (P˂ 0.01) of order of lactation was observed on peak yield as well as on days to attain peak yield. The least-squares means (μ) for gestation length and dry period was found to be 309.079 ± 1.387 days and 238.396 ± 5.664 days, respectively. Highly significant (P˂ 0.01) influence of sex of calf was observed on gestation length. Highly significant (P˂ 0.01) influence of order of lactation was seen on dry period. The overall least-squares means (μ) for service period and calving interval was found to be 177.709 ± 5.555 days and 486.700 ± 5.503 days, respectively. Highly significant (P˂ 0.01) influence of order of lactation was observed on calving interval. The overall least-squares means (μ) for milk fat %, solid-not fat %, milk protein % and total solids % were found to be 7.591 ± 1.148, 9.047 ± 0.052, 3.032 ± 1.126 and 16.638 ± 1.125 % respectively. Significant (P˂ 0.05) influence of location was observed on milk fat % and milk protein %.
  • ThesisItemOpen Access
    CHARACTERIZATION OF GHUMUSARI AND RAIGHAR GOATS OF ODISHA
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2019-07) PANIGRAHI, SUBHASHREE; DAS, BULA
    The present study was conducted to characterize two indigenous goat population of Odisha viz. the Ghumusari and the Raighar. Data were collected through field survey from the breeding tracts of these two varieties. Objectives of the investigation were to study some of the important morphometric traits, certain important traits of growth and reproduction and polymorphism of IGF1 gene. Records were obtained from 859 animals for coat colour, 216 animals for ear length and horn measurements, 375 animals for body measurements and growth traits and 272 animals for reproductive traits in Ghumusari goat. For Raighar goat, the corresponding number of animals for these traits were 667, 314, 394 and 338. Polymorphism of IGF1 gene was investigated on 50 animals from each of these two goat populations of Odisha. Coat colour was found to be predominantly black (66.13 per cent) in Ghumusari and deep brown (74.52 per cent) in Raighar. The overall least-squares means for ear length, horn length, horn circumference at base, space between two horns at base and the space between two horns at tip were 12.570±0.06, 5.111±0.03, 6.584±0.03, 4.598±0.03 and 9.778±0.03 cm respectively in Ghumusari. In Raighar goat, the respective values for these traits were 13.004±0.02, 5.243±0.02, 6.337±0.02, 2.986±0.02 and 10.440±0.03 cm. The LSM for body length at birth, 3, 6, 9 and 12 months of age were 27.069±0.10, 40.755±0.09, 46.282±0.11, 51.084±0.13 and 54.842±0.15 cm respectively in Ghumusari. The corresponding values for these traits were found to be 26.027±0.10, 45.545±0.13, 50.066±0.12, 53.852±0.15 and 55.887±0.14 cm in Raighar. Location had significant effect on body length at 9 months, season of birth at 12 months, and parity at 6 months of age in Raighar goat. Body length was significantly higher in males than in females at birth, 3 and 6 months of age in Ghumusari, and at 3 and 9 months of age in Raighar. Among the birth types, singlets had significantly higher body length at 3 months in Ghumusari, and at 6, 9 and 12 months of age in Raighar. The overall LSM for height at withers at birth, 3, 6, 9 and 12 months of age were 27.648±0.12, 42.048±0.09, 47.929±0.14, 52.380±0.15 and 54.678± 0.18 cm respectively in Ghumusari; and 27.591±0.13, 46.548±0.12, 52.882±0.15, 53.628±0.14 and 54.858±0.19 cm respectively in Raighar. Significant effect of parity at birth, sex at 3, 6, 9 months and type of birth at all the age groups was observed in both the populations. Raighar goat of Nuapada district showed significantly higher height at withers at birth, 6 and 9 months of age compared to those of Kalahandi and Nabarangpur districts. The overall LSM for heart girth at birth, 3, 6, 9 and 12 months of age were 25.346±0.09, 41.606±0.09, 47.701±0.15, 51.397±0.15 and 54.105±0.17 cm respectively in Ghumusari. The respective values were found to be 26.713±0.12, 46.273±0.17, 51.061±0.15, 54.612±0.15 and 58.540±0.16 cm in Raighar. Location (district) exhibited significant effect on heart girth at 6 and 9 months in Ghumusari and at 6 months of age in Raighar. Significant effect of parity at birth and birth type was found in Raighar goat at 3 months of age. The overall LSM for paunch girth at birth, 3, 6, 9 and 12 months of age were 26.866±0.09, 44.747±0.14, 49.333±0.16, 55.748±0.17 and 57.105±0.17cm respectively in Ghumusari. In Raighar goat, the corresponding values were found to be 28.101±0.09, 52.097±0.16, 53.791±0.16, 58.457±0.17 and 59.938±0.15 cm. The effect of parity and birth type at 3 months and sex at 10 birth, 3, 12 months of age were observed in Ghumusari. Location influenced paunch girth significantly at 3 months, birth type at 12 months and sex at 12 months of age in Raighar goat. The overall LSM for body weight at birth, 3, 6, 9 and 12 months were found to be 1.294±0.02, 6.376±0.04, 11.491±0.06, 14.597±0.06 and 16.630±0.09 kg respectively in Ghumusari goat, the respective values being 1.485±0.02, 6.432±0.04, 11.520±0.06, 14.739±0.06 and 16.668±0.09 kg in Raighar goat. In Ghumusari goat, with regard to body weight at all the ages, location and season of kidding showed non-significant effect. Parity at 3 months, sex and birth type at all the ages exerted significant effect on this trait. In Raighar goat, significant effect of location and sex at 3, 6, 9, 12 months of age; parity and birth type at all the ages; and season of kidding at 12 months of age for this trait was noted. The overall LSM for age at sexual maturity, weight at sexual maturity, age at first kidding, weight at first kidding, kid size at birth, kidding interval, gestation period and service period in Ghumusari were found to be 204.52±1.02 days, 11.64±0.05 kg, 375.49±1.18 days, 16.68±0.06 kg, 1.51 ± 0.03, 241.79±1.72 days, 148.09±0.13 days and 93.78±1.71 days respectively. For Raighar goat, these values were respectively 292.32±1.07 days, 14.63±0.05 kg, 456.66±1.22 days, 17.01±0.06 kg, 1.45 ± 0.03, 234.15±1.61 days, 147.67 ± 0.12 days and 86.65±1.60 days. In Ghumusari goat, kid size at birth was significantly affected by season of kidding. Parity had significant influence on age at sexual maturity, weight at sexual maturity, age at first kidding, weight at first kidding and kid size at birth. In Raighar goat, location had significant effect on age at sexual maturity, kidding interval and service period. Season of kidding exerted significant effect on age at sexual maturity, weight at sexual maturity, age at first kidding, weight at first kidding, kid size at birth, gestation period, and parity on weight at sexual maturity, kid size at birth, kidding interval and service period in this goat variety. The PCR-RFLP analysis was used to identify the variants in IGF1 gene based on the variants produced by digestion of 505 bp amplified product with HaeIII restriction enzyme. On restriction digestion, the 505 bp amplicon produced 4 fragments of 333, 234, 172 and 99 bp. The PCR-RFLP studies on IGF1 gene in both Ghumusari and Raighar goats of Odisha using HaeIII restriction enzyme revealed three banding patterns, arbitrarily designated as AA, AB and BB genotypes. Out of these, AA genotype yielded two fragments ( 333, 172 bp ), AB genotype yielded four fragments ( 333, 234, 172, 99 bp ), and BB genotype yielded three fragments ( 234, 172, 99 bp ). In Ghumusari goats, the frequencies of AA, AB and BB genotypes were 0.28, 0.32 and 0.4 respectively, and the frequencies of ‘A’ and ‘B’ alleles were 0.44 and 0.56 respectively. In Raighar goat, the frequencies of AA, AB and BB genotypes were 0.1, 0.5 and 0.4 respectively, and the frequencies of ‘A’ and ‘B’ alleles were 0.35 and 0.65 respectively. In the present study, the results showed polymorphic banding patterns in both the goat populations with respect to IGF1 gene. Chi-Square (χ2) test revealed that the population under study was in Hardy-Weinberg equilibrium. HaeIII restriction site was detected at 171th position of a total 505 bp by partial sequencing. The sequence alignment of the samples detected an SNP at 405th position with nucleotide transversion from G to C. Based on the uniformity in their productive and reproductive performances both the population are potent to be recognized as breed.
  • ThesisItemOpen Access
    GENETIC STUDIES ON THE PERFORMANCE OF HD-K75 PIGS
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-02) BAYAN, JYOTISHREE; Zaman, Galib Uz
    Pig farming in India is primarily a small scale unorganized rural activity and is an integral part of diversified agriculture particularly in the tribal belt of the country and have been contributing to improve the livelihood of poor and socially weaker section of the society including the tribal people of India. Pig farming in Assam is rapidly gaining momentum in recent years as the farmers are finding it a profitable enterprise. The present investigation was carried out on HD-K75 pigs (75% Hampshire inheritance and 25 % indigenous inheritance) that are bred and maintained in the All India Coordinated Research Project (AICRP) on pigs, ICAR, located at College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati-781022. The data were collected and compiled from the progenies of 44 sires and 114 dams maintained over a period of 6 years from 2012 to 2018. The objective of the investigation were to study some important traits of growth and reproduction and the effect of various non-genetic factors influencing these traits, determine heritability, genetic correlation and phenotypic correlation of some important growth and reproduction traits, to construct linear, partial and multiple regression equations and to predict adult body weights based on early body weights. Traits included in the study were body weights at birth, weaning, 1st, 2nd, 3rd, 4th, 6thand 8th months of ages, and daily body weight gains during pre-weaning (birth to weaning) and post-weaning periods (from weaning to 4th, 6th and 8th month of ages), age at sexual maturity, gestation period, farrowing interval, litter size at birth, litter weight at birth, litter size at weaning and litter weight at weaning. The overall mean body weight in HD-K75 pigs at birth, 1 month, weaning, 2 months, 3 months, 4 months, 6 months and 8 months of age were 1.001 ± 0.001 kg, 6.912 ± 0.011 kg, 9.666 ± 0.013 kg, 12.207 ± 0.007 kg, 18.324 ± 0.001 kg, 28.349 ± 0.052 kg, 51.177 ± 0.091 kg and 71.229 ± 0.110 kg respectively. The average daily body weight gains (ADG) in g during birth to weaning, weaning to 4th month, weaning to 6th month and weaning to 8th month of ages were 206.299 ± 0.311, 237.294 ± 0.773, 299541 ± 0.700 and 311.206 ± 0.557 respectively. Least-squares analysis of variance revealed highly significant effect of season of birth, parity and sex on body weight at all ages and daily body weight gains at various stages of growth. Piglets born during winter season had higher body weight at birth, 1 month, 42 days, whereas piglets born during post-monsoon season had higher body weight at 2 months, 3 months, 4 months and 6 months of age and piglets born during monsoon season had higher body weight at 8 months of age. Pre-weaning ADG was higher in piglets born during monsoon season and lowest in animals born during pre-monsoon season. The ADG during 42 days to 4th month and 42 days to 6th month were found to be higher in piglets born during post-monsoon season and lowest in piglets born during pre-monsoon season. Piglets born in second parity had higher body weight at 3 months, 4 months, 6 months and 8 months whereas piglets born in third parity had higher body weight at birth and 1 month and piglets born in first parity had higher body weight at weaning and 2 months of age. Significantly higher ADG was found during pre-weaning period of growth in animals born in first parity. Further, the ADG from 42 days to 4th month, 42 days to 6th month and 42 days to 8th months of age were found to be higher in animals born in second parity and revealed significant difference with the animals of first and third parities. Males showed higher body weight and higher ADG than females in all stages of growth. ii The h2 estimates for body weight and ADG at various stages of growth in the present study were moderate to high in most of the cases which indicated that the population under study possess good amount of additive genetic variance and there is scope of genetic improvement of the herd in terms of growth traits and ADG at various stages using adequate methods of selection by incorporating these estimates. The phenotypic correlations among body weights at various ages were moderate and positive in some cases and negative in some cases. The phenotypic correlations among ADG at various stages of growth were moderate and positive in some cases and negative in some cases. The genetic correlations among body weights at various ages of growth were low to high and positive in some cases and negative in some cases. The genetic correlations among ADG at various stages of growth were moderate and positive in some cases and negative in some cases. The overall means for age at sexual maturity, gestation length and farrowing interval were found to be 205.294 ± 1.054, 112.70 ± 0.119 and 216.781 ± 2.565 days respectively. Effect of season of birth on age at sexual maturity was found to be non-significant as indicated by least square analysis of variance. Non-significant effect of season of birth and parity on gestation period was observed in the present study in HD-K75 pigs. Least-squares analysis of variance revealed significant difference between the various seasons under study in respect of farrowing interval. Sows that farrowed during post-monsoon season had significantly longer farrowing interval and differed significantly with other seasons and the shortest farrowing interval was observed in sows that farrowed during monsoon season. Least square analysis of variance revealed that the effect of parity on farrowing interval in the present study was non-significant. The h2 estimates of age at sexual maturity, gestation length and farrowing interval for HD-K75 pigs was low to moderate in magnitude. The phenotypic correlation among the reproduction traits were found to be low and positive in most cases. The genetic correlation among the reproduction traits were found to be moderate and positive in most cases. The overall means for litter size at birth, litter size at weaning, litter weight at birth and litter weight at weaning were found to be 7.747 ± 0.088, 7.556 ± 0.093 numbers and 7.804 ± 0.084 and 74.644 ± 0.0886 kg respectively. Least-squares analysis of variance revealed significant effect of season of birth on litter size at birth, litter size at weaning, litter weight at birth and litter weight at weaning. Piglets born during pre-monsoon season showed highest litter size at birth and weaning. Piglets born during post-monsoon season and winter season showed highest litter weight at birth and litter weight at weaning. Further, litter size at birth, litter size at weaning, litter weight at birth and litter weight at weaning were found lowest during monsoon season. Least-squares analysis of variance revealed that parity had significant effect on litter size at birth, litter size at weaning, litter weight at birth and litter weight at weaning. Piglets born in third parity showed highest and piglets born in first parity showed lowest litter size at birth, litter size at weaning, litter weight at birth and litter weight at weaning respectively. The h2 estimates of litter size at birth and litter size at weaning in HD-K75 pigs in the present study were found to be low in magnitude. The h2 estimates of litter weight at birth and litter weight at weaning were found to be medium in magnitude. The phenotypic correlations among the litter traits were found to be high and positive in most cases. The genetic correlations among the litter traits were found to be moderate to high and positive in most cases. Prediction equations were developed using post-weaning body weights at 6 months (Y1) and 8 months (Y2) of ages as dependent variables based on pre-weaning body weights at birth (X1), 1 month (X2), 42 days (X3), 2 months (X4) and 3 months (X5) of age as independent variables in various combinations. For prediction of adult body weights on the basis of body weights at early ages in HD-K75 pigs, linear, partial and multiple regression equations were developed. The linear regression equations for predicting body weights at 6 months of age had comparatively higher R2 values than 8 months of age in HD-K75 pigs, but were not found to be reliable as the R2 values were less than 60 %. The partial regression equations for predicting body weights at 8 months of age had comparatively higher R2 values than 6 months of age and were found to be more reliable. All the multiple regression equations developed to predict the adult body weight at 8 months of age can be reliably used when 3-5 independent variables are considered. Multiple regression equations developed to predict 8 month body weight showed highest reliability with R2 values ranging from 70.87 to 90.56 %. High R2 values indicates that the 8 month body weight can be predicted more efficiently than 6 month body weight. The multiple regression equations for predicting body weight at 8 months using 3 independent variables viz. body weight at birth, 1 month and weaning showed high R2 value of 90.21 % which was found to be highly reliable and the best combination, though higher R2 values were obtained in multiple regression equations using 4 and 5 independent variables.
  • ThesisItemOpen Access
    GENETIC STUDIES ON GROWTH PERFORMANCE OF CROSSBRED PIGS
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-01) Rongpi, Racy; Ferdoci, A. M.
    The present study was carried out in 1025 piglets belonging to two genetic groups viz. Hampshire crossbred and crossbred of Tamworth and Desi (TND) pigs that were being bred and maintained at the Regional Pig Breeding Farm, Kyrdemkulai, Meghalaya. Performance records of 379 and 646 piglets born to 136 gilts/dams and 25 sires belonging to the two genetic groups during the year 2016-2019 were studied with a view to assess the genetic and phenotypic parameters of growth traits viz. body weights at different ages and daily body weight gains during pre-weaning and post-weaning periods. The overall least-squares means for body weight(kg) at birth, 4th week, 8th week, 12th week, 16th week, 20th week and 24th week of age were found to be 1.247±0.007, 5.615±0.013, 11.302±0.032, 17.246±0.029, 23.349±0.053, 30.584±0.064 and 38.528±0.057 respectively. The overall least The overall least The overall leastThe overall least The overall least The overall least The overall leastThe overall least -squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight squares means (LSM) for daily body weight gain dur gain dur gain dur ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8 ing the period from birth to 8th week, 8 week, 8week, 8 week, 8th to 24 to 24 th week and birth to 24 week and birth to 24week and birth to 24 week and birth to 24week and birth to 24 week and birth to 24 week and birth to 24 week and birth to 24 th week of week of week of week of week of growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 growth period were found to be 179.532±0.528, 243.0.20±0.462 and 221.866±0.335 respectively. respectively. respectively.respectively. respectively. respectively. respectively. The least The leastThe least The least -sq uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect genetiuares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti uares analysis of variance showed highly significant effect geneti c group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12 group on body weight at all ages except 12 group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12group on body weight at all ages except 12 group on body weight at all ages except 12 th and 16and 16 and 16 th week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher week of age. Significantly higher body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of body weight was observed in Hampshire crossbred pigs. The least squares analysis of variance f variance f variance f variance fvariance fvariance for effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly sior effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si or effect of genetic group on daily body weight gain showed highly si gnificant gnificant gnificant difference between 8 difference between 8 difference between 8difference between 8difference between 8 difference between 8difference between 8difference between 8 difference between 8 difference between 8difference between 8 difference between 8th to 16 to 16 th week and birth to 24 week and birth to 24week and birth to 24 week and birth to 24week and birth to 24 week and birth to 24 week and birth to 24 week and birth to 24 th week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly week of growth period. Significantly higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs.higher daily body weight gain was observed in Hampshire crossbred pigs.higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs.higher daily body weight gain was observed in Hampshire crossbred pigs. higher daily body weight gain was observed in Hampshire crossbred pigs. 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The least squares analysis of variance showed non The least squares analysis of variance showed nonThe least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed nonThe least squares analysis of variance showed non The least squares analysis of variance showed nonThe least squares analysis of variance showed nonThe least squares analysis of variance showed non The least squares analysis of variance showed nonThe least squares analysis of variance showed nonThe least squares analysis of variance showed nonThe least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed nonThe least squares analysis of variance showed nonThe least squares analysis of variance showed non The least squares analysis of variance showed nonThe least squares analysis of variance showed non The least squares analysis of variance showed non The least squares analysis of variance showed non-significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on significant effect of season on body weight at all ages except 20 body weight at all ages except 20 body weight at all ages except 20 body weight at all ages except 20body weight at all ages except 20body weight at all ages except 20 body weight at all ages except 20body weight at all ages except 20 body weight at all ages except 20body weight at all ages except 20body weight at all ages except 20 body weight at all ages except 20 body weight at all ages except 20body weight at all ages except 20 body weight at all ages except 20body weight at all ages except 20 body weight at all ages except 20body weight at all ages except 20 body weight at all ages except 20 th week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 week (between Season 1 and Season 3) 24and Season 3) and 24 and Season 3) 24and Season 3) and 24and Season 3) and 24and Season 3) and 24and Season 3) and 24 and Season 3) 24 and Season 3) 24and Season 3) and 24 and Season 3) 24 th week (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Pigleweek (between all the 3 seasons) of age. Pigle week (between all the 3 seasons) of age. Piglets born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month ts born during May to October month (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during (Season 2) maintained significantly higher body weights than the animals born during February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). February to March (Season 1) and December January 3). The least squares The least squares The least squares The least squares The least squares The least squares The least squares The least squares analysis of variance showed significant effect sanalysis of variance showed significant effect s analysis of variance showed significant effect s analysis of variance showed significant effect s analysis of variance showed significant effect sanalysis of variance showed significant effect s analysis of variance showed significant effect s analysis of variance showed significant effect sanalysis of variance showed significant effect s analysis of variance showed significant effect s analysis of variance showed significant effect s analysis of variance showed significant effect s analysis of variance showed significant effect sanalysis of variance showed significant effect s analysis of variance showed significant effect sanalysis of variance showed significant effect sanalysis of variance showed significant effect s analysis of variance showed significant effect sanalysis of variance showed significant effect sanalysis of variance showed significant effect s analysis of variance showed significant effect season on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during eason on daily body weight gain during various stages of growth except during birth to 8 various stages of growth except during birth to 8 various stages of growth except during birth to 8various stages of growth except during birth to 8 various stages of growth except during birth to 8 various stages of growth except during birth to 8various stages of growth except during birth to 8 various stages of growth except during birth to 8 various stages of growth except during birth to 8various stages of growth except during birth to 8 various stages of growth except during birth to 8 th week growth period. week growth period.week growth period. week growth period. week growth period. ii The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4The heritability estimates of body weight at birth, 4The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4 The heritability estimates of body weight at birth, 4th week, 8 week, 8week, 8 week, 8th week, 12 week, 12week, 12 week, 12 th week, week, week, 16 th week, 20 week, 20week, 20 week, 20 th week and 24 week and 24week and 24 week and 24week and 24week and 24 week and 24 th week of age were found as 0.392± week of age were found as 0.392±week of age were found as 0.392± week of age were found as 0.392± week of age were found as 0.392±week of age were found as 0.392± week of age were found as 0.392±week of age were found as 0.392± week of age were found as 0.392±week of age were found as 0.392±week of age were found as 0.392±week of age were found as 0.392± week of age were found as 0.392±week of age were found as 0.392±week of age were found as 0.392± week of age were found as 0.392± 0.128, 0.104±0.009, 0.128, 0.104±0.009, 0.128, 0.104±0.009, 0.128, 0.104±0.009, 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The 0.268±0.016, 0.408±0.022, 0.338±0.020, 0.130±0.013 and 0.940±0.042 respectively. The heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8 heritability estimates of daily body weight gain during birth to 8th week, 8 week, 8week, 8 week, 8th to 24 th week week week week and birth to 24and birth to 24 and birth to 24 and birth to 24 and birth to 24 th week growth period were found as 0.288±0. week growth period were found as 0.288±0.week growth period were found as 0.288±0. week growth period were found as 0.288±0. week growth period were found as 0.288±0. week growth period were found as 0.288±0. week growth period were found as 0.288±0. week growth period were found as 0.288±0. week growth period were found as 0.288±0.week growth period were found as 0.288±0.week growth period were found as 0.288±0.week growth period were found as 0.288±0. week growth period were found as 0.288±0. week growth period were found as 0.288±0.week growth period were found as 0.288±0. week growth period were found as 0.288±0. 020, 0.980±0.044 and 020, 0.980±0.044 and 020, 0.980±0.044 and 020, 0.980±0.044 and 020, 0.980±0.044 and 020, 0.980±0.044 and 0.844±0.040 respectively. 0.844±0.040 respectively. 0.844±0.040 respectively.0.844±0.040 respectively. 0.844±0.040 respectively. 0.844±0.040 respectively. 0.844±0.040 respectively. The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth The estimates of phenotypic correlation coefficients among body weight at birth with 4 th week, 8 week, 8week, 8 th week, 12 week, 12week, 12 week, 12week, 12 th week, 16 week, 16week, 16 th week, 20 week, 20week, 20 week, 20 th week and week andweek and week andweek and 24 th week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found as 0.056±0.034, 0.080±0.033, 0.271±0.032as 0.056±0.034, 0.080±0.033, 0.271±0.032 as 0.056±0.034, 0.080±0.033, 0.271±0.032 as 0.056±0.034, 0.080±0.033, 0.271±0.032 as 0.056±0.034, 0.080±0.033, 0.271±0.032 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 , 0.316±0.031, 0.081±0.036 and 0.061±0.037 respectively; between body weight at 4 respectively; between body weight at 4 respectively; between body weight at 4respectively; between body weight at 4 respectively; between body weight at 4 respectively; between body weight at 4 respectively; between body weight at 4respectively; between body weight at 4respectively; between body weight at 4respectively; between body weight at 4 respectively; between body weight at 4respectively; between body weight at 4respectively; between body weight at 4respectively; between body weight at 4 respectively; between body weight at 4 respectively; between body weight at 4 respectively; between body weight at 4 respectively; between body weight at 4respectively; between body weight at 4respectively; between body weight at 4 respectively; between body weight at 4th week with 8 week with 8week with 8week with 8week with 8 week with 8 week with 8th week, 12 week, 12week, 12 week, 12 th week, 16 week, 16week, 16 week, 16week, 16th week, 20 week, 20week, 20 week, 20 th week and 24 week and 24week and 24 week and 24week and 24 week and 24 th week as 0.274±0.032, 0.322±0.030, 0.350±0. week as 0.274±0.032, 0.322±0.030, 0.350±0.week as 0.274±0.032, 0.322±0.030, 0.350±0. week as 0.274±0.032, 0.322±0.030, 0.350±0.week as 0.274±0.032, 0.322±0.030, 0.350±0. week as 0.274±0.032, 0.322±0.030, 0.350±0. week as 0.274±0.032, 0.322±0.030, 0.350±0. week as 0.274±0.032, 0.322±0.030, 0.350±0. 029, 0.376±0.031 and 029, 0.376±0.031 and 029, 0.376±0.031 and 029, 0.376±0.031 and 029, 0.376±0.031 and 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at 0.169±0.036 respectively; between body weight at0.169±0.036 respectively; between body weight at0.169±0.036 respectively; between body weight at 8th week with 12 week with 12week with 12 week with 12 week with 12 th week, 16 week, 16week, 16 week, 16 th week, week, week, week, 20 th week and 24 week and 24week and 24 week and 24week and 24 week and 24week and 24 th week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and week of age as 0.288±0.031, 0.550±0.024, 0.542±0.025 and 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 120.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 120.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 120.132±0.036 respectively; between body weight at 120.132±0.036 respectively; between body weight at 12 0.132±0.036 respectively; between body weight at 12 th week with 16 week with 16week with 16 week with 16 week with 16 th week, week,week, 20 th week week week and 24and 24 and 24 th week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095week of age as 0.488±0.026, 0.481±0.028 and 0.095 week of age as 0.488±0.026, 0.481±0.028 and 0.095 ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; ±0.035 respectively; between body weight at 16 between body weight at 16 between body weight at 16between body weight at 16 between body weight at 16 between body weight at 16between body weight at 16 between body weight at 16 between body weight at 16between body weight at 16between body weight at 16 between body weight at 16 th week with 20 week with 20week with 20 week with 20 week with 20 th week and 24 week and 24week and 24 week and 24week and 24 week and 24 th week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 week of age as 0.488±0.027 and 0.179±0.036 respectively between body weight at 20and 0.179±0.036 respectively and between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20and 0.179±0.036 respectively and between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20and 0.179±0.036 respectively and between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20and 0.179±0.036 respectively and between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20 and 0.179±0.036 respectively between body weight at 20and 0.179±0.036 respectively and between body weight at 20and 0.179±0.036 respectively and between body weight at 20 and 0.179±0.036 respectively between body weight at 20 th week with 24 week with 24week with 24 week with 24 week with 24 th week o week oweek o week of age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficage as 0.125±0.028. The estimates of phenotypic correlation coeffic age as 0.125±0.028. The estimates of phenotypic correlation coefficients among daily ients among daily ients among daily ients among daily ients among daily ients among daily ients among daily ients among daily body weight gain during birth to 8 body weight gain during birth to 8 body weight gain during birth to 8 body weight gain during birth to 8body weight gain during birth to 8 body weight gain during birth to 8 body weight gain during birth to 8 body weight gain during birth to 8body weight gain during birth to 8 body weight gain during birth to 8 body weight gain during birth to 8th week with 8 week with 8week with 8 week with 8 week with 8th to 24 to 24 th week, 8 week, 8week, 8 week, 8th to 24 to 24to 24th week with week with week with week with birth to 24 birth to 24 birth to 24 th week and birth to 8 week and birth to 8week and birth to 8 week and birth to 8week and birth to 8 week and birth to 8 week and birth to 8 week and birth to 8week and birth to 8th week with birth to 24 week with birth to 24week with birth to 24 week with birth to 24 week with birth to 24week with birth to 24 week with birth to 24 week with birth to 24week with birth to 24 th week were found as week were found as week were found as week were found as week were found as week were found as week were found as week were found as week were found as week were found as -0. 182±0.036, 0.425±0.030 and 0.813±0.012 respectively. 182±0.036, 0.425±0.030 and 0.813±0.012 respectively.182±0.036, 0.425±0.030 and 0.813±0.012 respectively. 182±0.036, 0.425±0.030 and 0.813±0.012 respectively.182±0.036, 0.425±0.030 and 0.813±0.012 respectively. 182±0.036, 0.425±0.030 and 0.813±0.012 respectively. 182±0.036, 0.425±0.030 and 0.813±0.012 respectively. 182±0.036, 0.425±0.030 and 0.813±0.012 respectively. The estimates of The estimates ofThe estimates ofThe estimates of The estimates of The estimates of The estimates of genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth genetic correlation coefficients among body weights at birth with 4 th week, 8 week, 8week, 8 th week, 12 week, 12week, 12 week, 12week, 12 th week, 16 week, 16week, 16 th week, 20 week, 20week, 20 week, 20 th week and 24 week and 24week and 24 week and 24week and 24 th week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found week of age were found as 0.259±0.019, 0.125±0.014, 0.700±0as 0.259±0.019, 0.125±0.014, 0.700±0 as 0.259±0.019, 0.125±0.014, 0.700±0 as 0.259±0.019, 0.125±0.014, 0.700±0 as 0.259±0.019, 0.125±0.014, 0.700±0 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 .006, 0.594±0.009, 0.130±0.002 and 0.170±0.010 respectively; among bo respectively; among bo respectively; among borespectively; among bo respectively; among bo respectively; among bo respectively; among borespectively; among borespectively; among bo respectively; among bo dy weight at 4 dy weight at 4 dy weight at 4 dy weight at 4dy weight at 4dy weight at 4 dy weight at 4th week with 8 week with 8week with 8 week with 8 week with 8 week with 8th week, 12 week, 12week, 12 week, 12 th week, 16 week, 16week, 16 week, 16 th week, 20 week, 20week, 20 week, 20 th week and 24 week and 24week and 24 week and 24week and 24 week and 24 th week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±week of age as 0.286±0.003, 0.389±-0.107±0.004, 0.502±0.005 and 0.107±0.004, 0.502±0.005 and 0.107±0.004, 0.502±0.005 and 0.107±0.004, 0.502±0.005 and 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body w 0.146±0.003 respectively; among body weight at 8eight at 8 eight at 8eight at 8eight at 8 eight at 8th week with 12 week with 12week with 12 week with 12 week with 12 th week, 16 week, 16week, 16 week, 16week, 16th week, 20 week, 20week, 20 week, 20 th week and 24 week and 24week and 24 week and 24week and 24 th week week week of age as of age as of age as of age as of age as of age as -0.078±0.002, 0.137±0.078±0.002, 0.137±-0.055±0.004 and 0.192±0.002 0.055±0.004 and 0.192±0.002 respectively, among body weight at 12 respectively, among body weight at 12 respectively, among body weight at 12respectively, among body weight at 12 respectively, among body weight at 12 respectively, among body weight at 12 respectively, among body weight at 12 respectively, among body weight at 12respectively, among body weight at 12 respectively, among body weight at 12 respectively, among body weight at 12 respectively, among body weight at 12respectively, among body weight at 12respectively, among body weight at 12 th week with 16 week with 16week with 16week with 16 th week, 20 week, 20week, 20 th week and 24 week and 24week and 24 week and 24week and 24week and 24 th week of week of week of week of age as age as age as age as age as -0.214±0.002, 0.589±0.003 0.214±0.002, 0.589±0.003 0.214±0.002, 0.589±0.003 and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at and 0.119±0.005 respectively; among body weight at 12 th week with 20 week with 20week with 20 week with 20 week with 20 th week and 24 week and 24week and 24 week and 24week and 24 week and 24 th week of age as week of age as week of age as week of age as week of age as week of age as week of age as week of age as week of age as week of age as -0.101±0.004 and 0.257±0.101±0.004 and 0.257±0.101±0.004 and 0.257±0.101±0.004 and 0.257±0.101±0.004 and 0.257±0.101±0.004 and 0.257± iii respectively and among body weight at 20 respectively and among body weight at 20 respectively and among body weight at 20respectively and among body weight at 20 respectively and among body weight at 20 respectively and among body weight at 20 respectively and among body weight at 20respectively and among body weight at 20 respectively and among body weight at 20respectively and among body weight at 20 respectively and among body weight at 20 respectively and among body weight at 20 respectively and among body weight at 20 respectively and among body weight at 20respectively and among body weight at 20respectively and among body weight at 20 respectively and among body weight at 20 th week with 24 week with 24week with 24 week with 24 week with 24 th week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. week of age as 0.294±0.002. The estimates of genetic correlation coef The estimates of genetic correlation coefThe estimates of genetic correlation coefThe estimates of genetic correlation coef The estimates of genetic correlation coef The estimates of genetic correlation coef The estimates of genetic correlation coef The estimates of genetic correlation coef The estimates of genetic correlation coefThe estimates of genetic correlation coefThe estimates of genetic correlation coef The estimates of genetic correlation coefThe estimates of genetic correlation coefThe estimates of genetic correlation coefThe estimates of genetic correlation coef The estimates of genetic correlation coefThe estimates of genetic correlation coefThe estimates of genetic correlation coefThe estimates of genetic correlation coef The estimates of genetic correlation coef The estimates of genetic correlation coefThe estimates of genetic correlation coef The estimates of genetic correlation coefficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during ficients among daily body weight gain during birth to 8 birth to 8 birth to 8th week with 8 week with 8week with 8 week with 8 week with 8th to 24 to 24 th week, 8 week, 8week, 8 week, 8th to 24 to 24 th week with birth to 24 week with birth to 24week with birth to 24 week with birth to 24 week with birth to 24 week with birth to 24 week with birth to 24 th week and birth week and birth week and birth week and birth week and birth week and birth week and birth to 8 to 8th week with birth to 24 week with birth to 24week with birth to 24 week with birth to 24 week with birth to 24 week with birth to 24 week with birth to 24 th week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, week growth period were found as 0.052±0.003, 0.526±0.002 and 0.077±respectively. 0.526±0.002 and 0.077±respectively. 0.526±0.002 and 0.077±respectively. 0.526±0.002 and 0.077±respectively.0.526±0.002 and 0.077±respectively. 0.526±0.002 and 0.077±respectively. 0.526±0.002 and 0.077±respectively. 0.526±0.002 and 0.077±0.002 respectively.
  • ThesisItemOpen Access
    PERFORMANCE OF INDIGENOUS CHICKEN IN CERTAIN DISTRICTS OF ASSAM UNDER BACKYARD FARMING SYSTEM
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2021-12) ISLAM, JEHIRUL; Ferdoci, A. M.
    The study was conducted on indigenous chickens of Darrang and Udalguri district of Assam to evaluate growth, performance and reproductive traits. Data on body weights relating to 747 birds were used in the study. The data of 115, 137 and 95 number of birds were utilized for age at first egg, annual egg production and reproductive traits respectively. Fifty eggs were randomly collected for the study of egg quality traits. Data were collected during the period from August, 2020 to June, 2021 through field survey and interviewed the farmers with pre-tested questionnaire. The overall least-squares means of body weight at day old stage, 20 weeks and 40 weeks were found to be 28.332±0.218, 745.719±4.479 and 1296.984±6.971 g respectively. The body weight of males at 20 weeks and 40 weeks were found to be 779.924±7.995 g and 1389.121±11.670 g and the corresponding values of females were found to be 711.513±5.407 g and 1204.846±8.691 g respectively. Chicken of Darrang district had higher body weight of 29.002±0.304, 750.310±6.215 and 1302.030±9.596 g at day old stage, 20 and 40 weeks of age than Udalguri district with 27.662±0.314, 741.128±6.461 and 1291.938±10.142 g respectively. Significant effect of district on body weight at day old stage (P<0.01), 20 weeks (P<0.05) and 40 weeks (P<0.01) were observed. The overall least-squares means for age at first egg was found to be 199.286±4.236 days. The least-squares means for age at first egg in Darrang and Udalguri district were 196.741±7.986 and 201.831±9.022 days respectively which were found to be non-significant. The overall least-squares means for annual egg production was found to be 65.236±0.813 numbers. The least-squares means for annual egg production in Darrang and Udalguri district were 67.901±1.137 and 65.570±1.162 numbers respectively which were found to be significant (P<0.01). The overall mean for egg weight (g), Albumen index, Yolk index, Haugh unit, Shell thickness (mm) and Shape index were recorded as 40.54±0.63, 0.077±0.003, 0.502±0.006, 70.213±0.700, 0.323±0.003 and 75.725±0.407 respectively. The egg shell colours were mostly light brown followed by creamy white. The average fertility and hatchability were recorded as 90.75 % and 87.42 % respectively.
  • ThesisItemOpen Access
    CHARACTERIZATION OF INDIGENOUS GEESE OF ASSAM
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2021-12) HOQUE, HANIDUL; Phookan, Arundhati
    The present study carried out in indigenous geese of Assam belonging to, Udalguri, Nalbari, Darrang and Barpeta district. Data pertaining to a total of 251, 686, 184, 845 nos. of geese and 32 nos. of eggs were utilized to study physical characteristics; body weight and body measurements; productive and reproductive traits; mortality percentage and egg quality traits. Indigenous geese were found to be Cinnamon coloured with border plumage pattern and White coloured with solid plumage pattern. Bill colour was observed to be black, orange, yellow and admixture of black and orange. Shank and feet colour were observed to be orange and yellow. Least–squares means(LSM) for body weight at hatching, 1month, 2months, 3months, 4months, 6-8 months and 12 months and above age were found to be 0.087±0.001, 0.514±0.005, 1.699±0.043, 2.740±0.031, 3.030±0.022, 3.480±0.055 and 3.970±0.025 kg respectively. LSM for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, for body length, circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast circumference, bill length, width, head neck breast shank length shank length shank length shank length shank length shank length shank length shank length shank length shank length and feet length were 8.606±0.020, 12.437±0.119, 1.813±0.022, 1.125±0.015, 2.610±0.03,1.496±0.018, 2.820±0.024, 6.259±0.025, 2.802±0.021 and 2.686±0.022cm at hatching; 17.151±0.158, 18.59±0.163, 3.228±0.031, 1.626±0.020, 5.671±0.040, 2.267±0.030, 6.398 ±0.040, 14.426±0.181, 5.461±0.047 and 5.151±0.050 cm at 1 month; 28.220±0.535, 30.080±0.496, 5.044±0.090, 2.060±0.028, 6.805±0.067, 2.655±0.036, 11.036±0.247, 16.686±0.128, 6.688±0.069 and 6.191±0.066 cm at 2 months; 36.700±0.329, 38.040±0.332, 6.784±0.067, 2.123±0.025, 6.793±0.066, 2.702±0.047, 14.036±0.104, 21.944±0.206, 7.206±0.037 and 6.764±0.037cm at 3 months, 37.956±0.326, 39.220±0.286, 7.012±0.041, 2.359±0.028, 7.674±0.036, 3.144±0.034, 16.168±0.129, 24.169±0.109, 7.916±0.040 and 7.458±0.043 cm at 4 months; 40.282±0.349, 42.580±0.405, 7.697±0.055, 2.496±0.028, 7.997±0.046, 3.414±0.030, 17.186 ±0.100, 25.623±0.237, 8.052±0.038 and 7.586±0.037cm at 6-8 months and 44.954±0.159, 48.876±0.192, 8.491±0.017, 3.304±0.017, 9.723±0.037, 4.207±0.019, 19.097±0.051, 27.998±0.099, 8.376±0.016 and 7.954±0.016 cm at 12 months and above age. Body weights and body measurements were found to be significantly higher in males. Geese from Darrang district were found to have significantly higher body measurements. LSM for age at first egg, annual egg production, clutch size and clutch interval was found to be 320.196±2.882 days, 19.886±0.306 nos., 9.897±0.143 nos. and 59.206±0.531 days. Two laying cycles in a year observed i.e. September to November and December to February and each laying cycle ranged from 12 days to 1 month. Average egg weight, shape index, shell weight, shell thickness, specific gravity, albumen index, Haugh unit and yolk index were found to be 115.445±2.320 g, 70.476±1.120, 16.756±0.282 g, 0.560±0.009 mm, 1.285±0.017, 0.075±0.001, 64.662±1.201 and 0.362±0.006.Yolk colour observed to be yellow and sometimes orange. Egg shell colour was observed white and sometime cloudy white. Geese found to be quite broody. Average fertility and hatchability % (TES) were found to be 87.11% and 80.53%. Average mortality % were recorded as 12.93, 9.52, 6.74 and 3.07 % for 0 to 1 week, 2 to 4 weeks, 4 to 20 weeks and 24 weeks and above age groups.
  • ThesisItemOpen Access
    STUDIES ON BODY CONFORMATION, PERFORMANCE AND EXPRESSION OF CERTAIN GENES RELATED TO PROLIFICACY IN SIROHI GOATS UNDER FARM CONDITION IN ASSAM
    (Assam Agricultural University, Khanapara,Guwahati, 2017-07) SARMAH, SANGEETA; Das, Arpana
    The present study was conducted for performance evaluation of certain traits of growth and reproduction in Sirohi goats as well as to study the expression profile of GDF 9 gene related to prolificacy in Sirohi and Assam Hill goats. Data on 250 Sirohi goats for the study of growth and morphometric traits and 310 Sirohi goats for the study of reproductive traits maintained at the Sheep and Goat Breeding Farm, Silonijan, Karbi Anglong , Assam were utilized for the study. The least square means for body weight, body length, heart girth and height at wither were 2.500±0.012 kg, 25.060±0.135 cm, 25.988±0.172 cm and 25.846±0.181cm at birth; 5.607±0.041kg, 41.442±0.232 cm, 45.378±0.391cm, 41.750±0.248 cm at 3 month; 11.734±0.107 kg, 50.527±0.220 cm, 55.390±0.368 cm and 51.915±0.290 cm at 6 month; 16.778±0.177 kg, 60.864±0.212 cm, 62.978±0.323 cm and 62.173±0.272 cm in 9 month; 22.864±0.196 kg, 71.107±0.217 cm, 71.613±0.227 cm and 71.851±0.239 cm at 12 month of age respectively. Parity and period of birth exerted significant (P<0.01) effect on body length, heart girth and height at wither 12 month of age. Season of birth had significant effect (P<0.01) on body weight, body length, heart girth and height at wither. Body weight, body length and heart girth also differed significantly (P<0.01) due to kidding type and single born kids had higher values than the twins. Significant effect of sex was observed on body weight, body length, heart girth and height at wither at all age groups. The male goats were superior to the females in respect of all these traits. The least square means for age at first kidding, gestation period, service period and interkidding period pertaining to first parity were 701.710±2.267 days, 148.895±0.321 days, 195.545 ±1.513 days and 343.898±1.584 days, respectively. The overall mean for gestation period, service period and interkidding period pertaining to all parities were 147.800±0.429 days, 188.553±1.201 days and 336.662±1.102 days, respectively. Period of kidding exerted significant effect on age at first kidding, service period and interkidding period. Kidding order also exerted significant effect on service period and interkidding period and lowest values were obtained in 5th parity. The growth pattern of Sirohi goats from birth to one year of age was found to be little slower from birth to 3 month, faster from 3 to 6 month, again slower from 6 to 9 month and then accelerated from 9 to 12 month of age. Linear and multiple regression equations were developed for prediction of 1 year body weight from the body weight at birth, 3, 6 and 9 month of age and observed that prediction of 1 year body weight could be done from the body weight at earlier ages. The phenotypic correlations among the body weight at different ages were found to be high and positive. Expression of GDF9 gene in Sirohi and Assam Hill goat did not differ significantly as revealed by paired t-test.