GENETIC, PHENOTYPIC AND RESIDUAL CORRELATIONS AMONG VARIOUS PERFORMANCE TRAITS
IN TEDDY GOATS
Asad Ullah Hyder, Muhammad Sajjad Khan, Pervez Akhtar and Khalid Zafar
Gondal1
Department of Animal Breeding and Genetics,1Department of
Livestock Management, University of Agriculture, Faisalabad, Pakistan
Abstract
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-weaning growth, 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 were found 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 correlations indicated a strong negative correlation between birth
weight and pre-weaning daily gain and birth weight and age at first kidding.
Key words:
Phenotypic and genetic correlations, Performance traits. Teddy goats