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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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2016 - 20173
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Subject: Animal Genetics and Breeding × End date: 2019 × Thesis Type: M.V.Sc. ×
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Now showing 1 - 3 of 3
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    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.
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    ThesisItemOpen Access
    TYPE CHARACTERIZATION OF INDIGENOUS CATTLE (BOS INDICUS) OF ARUNACHAL PRADESH
    (Assam Agricultural University, Khanapara,Guwahati, 2017-07) KAKKI, MARPI; Zaman, G.U.
    A total of 404 animals for body measurement, 810 lactation records for performance traits, 71 birth weight records and 140 milk samples for estimation of milk constituents from indigenous cattle of Arunachal Pradesh were utilized in the present study. The data obtained were classified according to location, age group, lactation order, sex and stage of lactation. The least-squares means for head length, eye to eye space, breadth of forehead, neck length, neck circumference, horn length, horn circumference at base, horn circumference at middle, horn circumference at tip, distance between two horns at base, distance between two horns at middle, distance between two horns at tip, ear length, body length, height at withers, heart girth, pouch girth, length of arm, elbow length, fore shank length, thigh length, hind shank length, length of pes, length of tail, length of switch, length of udder, width of udder, depth of udder, teat length and teat diameter were 32.269 ± 0.112, 12.749 ± 0.048, 13.239 ± 0.040, 27.718 ± 0.085, 56.551 ± 0.237, 10.348 ± 0.087, 10.517 ± 0.035, 7.898 ± 0.037, 3.715 ± 0.020, 12.615 ± 0.038, 16.854 ± 0.044, 17.419 ± 0.046, 16.975 ± 0.032, 98.475 ± 0.155, 97.123 ± 0.153, 117.582 ± 0.241, 122.462 ± 0.243, 24.448 ± 0.048, 25.599 ± 0.043, 24.970 ± 0.041, 26.426 ± 0.052, 27.598 ± 0.054, 29.206 ± 0.061, 50.498 ± 0.160, 26.628 ± 0.072, 30.940 ± 0.105, 21.506 ± 0.069, 9.923 ± 0.037, 4.459 ± 0.024 and 2.762 ± 0.025cm respectively. Age, sex and location had significant effect on various measurements under head and neck, body, legs, feet and tail and udder. The most predominant horn orientation was curved upward (37.30 per cent) with black (55.14 per cent) and grey (44.86 per cent) horn colours and horizontal type of ear orientation. Among the 8 (eight) types of coat colours recorded, brown (30.69 per cent) was predominant, while common colours of muzzle, hoof and switch were black with a frequency of 73.76 per cent, 73.02 per cent and 65.59 per cent respectively. The least-squares means for age at first calving, lactation milk yield, lactation length, peak yield, days to attain peak yield, dry period, gestation period, inter calving period and birth weight of indigenous cattle of Arunachal Pradesh were found to be 44.553 ± 0.138 months, 296.710 ± 0.803 kg, 239.513 ± 0.483 days, 1.820 ± 0.005 kg, 35.974 ± 0.076 days, 209.957 ± 0.742 days, 272.557 ± 0.073 days, 447.085 ± 0.702 days and 14.554 ± 0.103 kg respectively. Location had significant effect on all the productive and reproductive traits except peak yield, days to attain peak yield, dry period and gestation period whereas the effect of lactation order was non-significant for gestation period. Farmers followed semi-intensive type of management system. The least-squares means for fat, solids-not-fat, protein and total solids per cent of milk in indigenous cows of Arunachal Pradesh were 5.895 ± 0.032 per cent, 8.582 ± 0.027 per cent, 2.790 ± 0.017 per cent and 14.483 ± 0.048 per cent respectively. Location and lactation order showed non-significant effect on all the milk constituents viz., fat, solids-not-fat, protein and total solids percentage however, stage of lactation showed significant effect on fat and total solids percentage.
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    ThesisItemOpen Access
    STUDIES ON BODY CONFORMATION, FIBRE CHARACTERISTICS AND POLYMORPHISM OF KAP 8.2 GENE IN NAGALAND LONG HAIRED GOAT
    (Assam Agricultural University, Khanapara, Guwahati, 2016-07) SHEETAL, J. C. K; Aziz, Abdul
    The present work was undertaken to study body conformation, body weight and important fibre characteristics as well as to identify polymorphism in genomic sequences of KAP 8.2 gene and its association with fibre traits on Nagaland Long Haired Goat of Nagaland. A total of 75 animals of both sex constituted the material of the study for body conformation, body weight and fibre characteristics, whereas polymorphism of KAP 8.2 gene were studied on 25 animals. The pooled averages for length of horn, distance between horns at base, distance between horns at middle, distance between horns at tip, circumference of horn at base, circumference of horn at middle, and circumference of horn at tip were 11.165 ± 0.036, 2.827 ± 0.046, 5.818 ± 0.049, 8.818 ± 0.049, 8.996 ± 0.119, 6.096 ± 0.029, 2.423 ± 0.020 cm respectively in age group G4. The corresponding value for the above traits were 11. 933 ± 0.078, 3.203 ± 0.035, 6.203 ± 0.035, 9.203 ± 0.179, 9.161 ± 0.063, 6.332 ± 0.048, 3.433 ± 0.188 cm respectively in age group G5. The pooled averages for length of head, breadth of head and eye to eye space were 13.766 ± 0.179, 6.742 ± 0.040 and 6.525 ± 0.049 cm respectively in G1; 14.225 ± 0.029, 6.921 ± 0.040, 6.604 ± 0.038 cm respectively in G2; 14.404 ± 0.029, 7.167 ± 0.027 and 7.035 ± 0.134 cm respectively in G3; 14.798 ± 0.031, 7.398 ± 0.028 and 7.766 ± 0.219 cm respectively in G4; 15.280 ± 0.330, 7.611 ± 0.025 and 8.445 ± 0.116 cm respectively in G5. The pooled averages for length of body, height at withers and heart girth were 35.675 ± 0.146, 32.850 ± 0.367 and 36.515 ± 0.170 cm respectively in G1; 38.312 ± 0.205, 36.401 ± 0.241 and 38.066 0.639 cm respectively in G2; 41.363 ± 0.148, 40.446 ± 0.375 and 42.072 ± 0.211 cm respectively in G3; 44.385 ± 0.197, 42.721 ± 0.357 and 46.305 ± 0.265 cm respectively in G4; 47.531 ± 0.406, 44.626 ± 0.308 and 48.450 ± 0.347 cm respectively in G5. The pooled averages for tail length and body weight were 10.208 ± 0.126 cm and 3.625 ± 0.167 kg respectively in G1; 10.941 ± 0.277 cm and 4.683 ± 6.328 kg respectively in G2; 11.424 ± 0.150 cm and 8.211 ± 0.127 kg respectively in G3; 12.161 ± 0.117 cm and 12.369 ± 0.303 kg respectively in G4; 12.991 ± 0.085 cm and 13.812 ± 0.119 kg respectively in G5. The pooled averages for fibre length and fibre diameter were 4.117 ± 0.054 cm and 0.087 ± 0.049 g respectively in G1; 5.242 ± 0.042 cm and 0.099 ± 0.047 g respectively in G2; 5.943 ± 0.095 cm and 0.147 ± 0.028 g respectively in G3; 9.367 ± 0.180 cm and 0.228 ± 0.084 g respectively in G4; 13.245 ± 0.526 cm and 0.228 ± 0.084 g respectively in G5. Genetic variations of KAP 8.2 gene studied on 25 animals (11 male and 14 female) revealed polymorphism. The goats with AB genotype had significantly thicker fibre diameter as compared to those with AA genotype.