Non-genetic factors affecting pre-weaning growth and morphometric traits in Assam Hill goat

Aim: This study aimed to determine the genetic and non-genetic factors affecting pre-weaning body weight (BW) and morphometry in Assam Hill goat along with the genetic parameters. Materials and Methods: The detailed information in respect of BW and body measurements of 960 animals at birth and 3 months of age belonging to three different populations of Assam Hill goat maintained at field units, namely, Batabari, Nahira, and Tetelia under "All India Coordinated Research Project on Goat Improvement" were utilized in the present study. The data were analyzed using least squares technique. Results: The least squares means for BW, height at withers (HW), heart girth (HG), and body length (BL) were 1.166±0.008 kg, 26.198±0.070 cm, 26.695±0.096 cm, and 29.482±0.119 cm at birth and 4.590±0.083 kg, 36.850±0.105 cm, 40.741±0.115 cm, and 39.703±0.108 cm at 3 months of age, respectively. Location had a significant effect on BW, HW, and BL at both birth and 3 months and on HG at 3 months of age. Season of birth exerted significant effect only on BL at birth, whereas the significant effect of sex was observed on HG and BL at 3 months of age. The heritability estimates for BW and body measurements were moderate indicating the scope of selection. The phenotypic and genetic correlations among BWs and body measurements at birth and 3 months of age were positive in direction and high in magnitude. Conclusion: On the basis of the present findings, it could be concluded that the weaning weight of kids can be considered for the selection of parent stock to increase productivity and eventually the economic efficiency. Further, animals with higher body measurements at initial phases of growth will perform better with respect to even BW at later stages of growth

Molecular characterization of Nagaland Long Hair Goat

Nagaland Long hair goat comprises a small population of non-descript indigenous animals. Twenty microsatellite markers on Nagaland Long Hair goat (NLHG) were tested to understand the genetic diversity within the population. All the loci studied were polymorphic in nature. The number of observed alleles (Na) detected ranged from 2 to 8 with an overall mean of 5.0±1.716. A total of 100 alleles were observed across all loci. The effective number of alleles (Ne) ranged from 1.2195 to 5.4340 with a mean of 2.93±1.330. The allele frequency ranged from 0.0312 to 0.9000. Overall mean observed (HO) and expected (He) heterozygosity were 0.56 and 0.48 this population was in Hardy-Weinberg equilibrium at most of the loci studied. The overall mean within-population inbreeding estimate (FIS) was 0.058.  The population was stable with respect to size and was non-bottlenecked. The observed normal L – shaped curve indicated no mode shift in the population

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Not AvailableAssam Hill goat (AHG) is an important goat germplasm found in Assam and its adjoining areas of India. The study was designed with an objective to study the semen characteristics and freezability of AHG buck semen using Tris -Egg yolkCitrate-Fructose diluent. The mean values of fresh semen characteristics in AHG bucks viz., ejaculate volume (ml), initial sperm motility (%), sperm concentration (x106/ml), live sperm (%), sperm abnormality (%), HOST-reacted sperm (%) andintact acrosome (%) recorded were 0.39 ± 0.01, 77.97 ± 0.73, 3201.00 ± 143.78, 83.02 ± 0.65, 7.66 ± 0.73, 66.95 ± 0.74 and 93.34 ± 0.51, respectively. Mean values for post-thaw semen characteristics i.e., sperm motility (%), live sperm (%),HOST-reacted sperm (%) and intact acrosome (%) were 55.39 ± 0.97, 71.01 ± 0.78, 54.77 ± 0.55 and 82.16 ± 0.43, respectively. It can be concluded that AHG bucks donate acceptable quality of semen which can be frozen successfully in Tris-Egg yolk-Citrate-Fructose diluents for using in Artificial Insemination.Not Availabl

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Not AvailableCharacteristics and freezability of Assam Hill goat semen.Not Availabl

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Not AvailableCharacteristics and freezability of Assam Hill goat semen.Not Availabl

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Not AvailableAn experiment was carried out to study the electrophoretic profile of sperm membrane proteins in Assam Hill goat (AHG) bucks and their correlation with fresh semen characteristics. Ejaculates (64) consisting of 8 each from 8 bucks were collected by artificial vagina method. Each ejaculate was split into 2 equal parts. First part was used for fresh semen evaluation and the other part for protein study. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) indicated 20 different protein bands with molecular weight ranging from 10 kDa to 75 kDa. Among the 20 proteins, only 6 proteins bands were consistently present in all 8 bucks (100%). Protein bands with molecular weight 10, 14, 22, 28, 55, 57 and 60 kDa showed significant positive correlation with certain parameters of the fresh semen, while 47 kDa protein band presented negative correlation with fresh semen characteristics in AHG bucks. In conclusion, the proteins showing significant positive correlation with fresh semen characteristics might serve to screen semen of AHG bucks for breeding programmes.Not Availabl

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Not AvailableElectrophoretic profile of sperm membrane proteins and correlation with fresh semen characteristics in Assam Hill goat.Not Availabl