Least-square Analysis of Non-genetic Factors on the Growth Performance Traits of HD-K75 Pigs

Northeastern India has a good population of indigenous pig breeds with unique traits. However, they possess reduced productive and reproductive potential compared to exotic breeds of pigs. So, the HD-K75 pig variety with 75% Hampshire inheritance and 25 % indigenous inheritance has been developed under AICRP on pigs. Records about the progenies of 44 sires and 114 dams of HD-K75 pigs maintained over 6 years were utilized through least square analysis to study the pre- and post-weaning growth. The least squares analysis of variance technique was carried out to study the effects of season of birth, sex, and parity on the traits under study. Duncan’s Multiple Range Test (DMRT) was used to make all the pairwise comparisons among the means to test the significance of differences among the different subclasses for various traits. The overall least-squares means of the HD-K75 pigs for body weight at birth, 1 month, weaning, 2 months, 3 months, 4 months, 6 months, 8 months and average daily gain during birth to 42 days, 42 days to 4th month, 42 days to 6th month and 42 days to 8th month of age were found to be 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, 71.229 ± 0.110 kg, 206.299 ± 0.311 g, 237.294 ± 0.773 g, 299.541 ± 0.700 g and 311.206 ± 0.557 g respectively. The effect of season of birth, parity, and sex on body weight at various growth stages and average daily gain (ADG) at various growth periods were found to be significant. Hence, the popularization of this crossbreed pig variety would increase the production, livelihood, and income of the regional farmers.