Genetic parameter estimates for growth performance of crossbred piglets

Abstract

The direct heritability estimates for piglet weights in pre and post weaning stages were moderate and improvement through mass selection is plausible. In the pre-weaning stage, the piglets had maximum genetic potential at birth (BW) to be exploited through direct selection. The 3 random effects, namely direct additive, maternal additive and litter permanent environmental effects had significant roles during different phases of pre-weaning growth and all must be included in the model used for formulating a breeding program. For post-weaning traits, the direct additive and permanent litter effects were the predominant factors governing the variability. The non-significance of postweaning maternal influence was as per expectation because the piglets moved away from maternal care after 8thweekof age.

Genome-wide association study of birth weight and pre-weaning body weight of crossbred pigs

“…The group wise least square means along with error values for different subclass under year of farrowing, sex, litter size groups for all traits under study were given in detail under the Table 1. The genetic evaluation of same population had been accomplished using random regression models and animal models (Chaudhary et al 2019, Chaudhary et al 2020 Total of 20,467 SNPs were left out with 0.86 genotyping call rate from 96 animals were genotyped by GBS technology. Similarly, had detected 41,108 autosomal SNPs was detected by GBS technique from 2,936 Duroc boars (Tan et al 2017).…”