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20172
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Subject: Animal Genetics and Breeding × End date: 2017 × Start date: 2017 × Thesis Type: M.V.Sc. ×
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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.