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KMID : 1025520010430040445
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Journal of Animal Science and Technology
2001 Volume.43 No. 4 p.445 ~ p.450
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Estimation of Genetic Parameters of Birth Weight and Preweaning Gain of Hanwoo Using Multiple Trait Animal Model
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Abstract
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Genetic parameters of birth weight and preweaning gain were estimated using multiple trait animal model on the basis of the data from Hanwoo raised at Hanwoo Improvement Center, National Agricultural Cooperatives Federation from 1990 to 1998. Heritabilities of direct and maternal genetic effects estimated were 0.15 and 0.02, respectively, far birth weight and 0.17 and 0.16 for preweaning gain. Genetic correlations between direct and maternal genetic effects were -0.28 for birth weight and -0.45 for preweaning gain. Genetic correlation between direct genetic effect of birth weight and direct genetic effect of preweaning gain estimated was 0.42 and the correlation between maternal genetic effect of birth weight and maternal genetic effect of preweaning gain was 0.34. The genetic trend estimated as the regression of the breeding value of the trait on year of birth was 0.004±0.0008㎏ per year for birth weight and 0.047±0.0052㎏ for preweaning gain.
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