Estimates of Genetic and Phenotypic Trend for Growth Traits in Etawah Grade Goat
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The aim of this study was to estimate genetic parameter consisting of heritability and genetic and phenotypic trends of growth traits. Growth traits studied were birth weight (BW), weaning weight (WW), 6 months of age weight (6WM), 12 months of age weight (12WM) and 18 of age weight ( l 8WM). Data used in this study were collected from Breeding Center ofEtawah Grade goat in Pelaihari from 2007 to 2011. The heritability were estimated using Mixed Model Least Square and Maximum Likelihood procedure. The genetic and phenotypic trends were calculated using regression equation. Estimation of heritability for BW, WW, 6WM, 12WM and 18WM were 0.54; 0.35; 0.37; 0.68 and 0.63, respectively. The genetic trend ofBW and WW were decreased 0.019 and 0.020 kg. In contrast for 6WM, 12WM and 18 WM were increased 0.003; 0.009 and 0.005 kg, respectively. The phenotypic trend for all growth traits including BW, WW, 6WM, 12WM and l 8WM decreased 0.02; 0.53; 1.11; 2.23 and 5.18 kg, respectively. The heritability of growth traits were considered as moderate to high (0.35-0.68) which means that selection program will be more efficient and effective to improvement the genetic merits in Etawah Grade goats.
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