Genetic, phenotypic and residual correlations among various performance traits in Teddy goats

摘要

The data on pedigree and performance records of 1666 Teddy goats maintained at the Livestock Production Research Institute, Bahadurnagar (Okara), Pakistan were analyzed in the present study. Birth weight, weaning weight, yearling weight, pre-weaninggrowth, age at first kidding and number of kids weaned were the traits analyzed. The bivariate model of derivative-free restricted maximum likelihood (DFREML) computer programme was used to estimate the correlations. Significant genetic correlations werefound between birth weight and weaning weight (0.69) and weaning weight and yearling weight (0.61) while phenotypic correlations between birth weight and weaning weight (0.65), birth weight and age at first kidding (-0.61) and weaning weight and yearling weight (0.52) were found significant. The residual correlation indicated a strong negative correlation between birth weight and pre-weaning daily gain and birth weight and age at first kidding.