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Data collected of kids born from 1990 to 1999 in Sanandaj Markhoz Goat Reserch Station, were used in this research. Traits studied were, birth
weight (BW) weaning weight (WW), and yearling weight (YW). Heritability estimates were obtained for BW, WW and YW, employing DF-REML
procedures under univariate animal models. By ignoring or including maternal genetic and environmental effects, three different models of analysis were
fitted for each trait. Log likelihood ratio tests indicated that the model including a direct and maternal genetic effect as well as maternal permenent
environmental effect was the most suitable model for all traits. Direct
heritability estimates for BW, WW and YW were 0.22+0.09, 0.18+0.09 and 0.22 +0.06 respectivelly. Maternal heritability estimates for the mentioned triats were 0.06+0.09, 0.02 +0.09 and 0.05 +0.06 respectively. For the
estimation of correlation between traits, bivariate analysis was carried out fitting direct effects only. Genetic and phenotypic correlations were obtained
between BW-WW (0.38, 0.32), BW-YW (0.52, 0.49) and WW-YW (0.69, 0.52) respectively.