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KMID : 1025520080500040457
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Journal of Animal Science and Technology
2008 Volume.50 No. 4 p.457 ~ p.464
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Genetic Correlation of Reproductive Trait in Pigs by Parity
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Cho Kyu-Ho
Kim Myung-Jick
Lee Il-Joo
Kim In-Cheul
Jeon Gwang-Joo
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Abstract
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Heritability and genetic correlation for reproductive traits in Yorkshire pig breed were estimated using Bayesian method via Gibbs sampling. The data set consisted of 9,609 reproductive records at pig breeding farm in Korea. For estimating those parameters using Gibbs sampling, 5,000 cycles of ‘burn-in’ period were discarded among a total of 55,000 samples. Out of the remaining 50,000 samples, 5,000 estimates by each parameter were retained and used for analyses to avoid any correlation among adjacent samples. The reproductive trait considered in this study were total number of born piglets(TNB) and estimated by two different models. The estimated heritability and permanent environmental effect using Gibbs sampler were 0.12±0.020 and 10.9±1.63, respectively. Estimated genetic correlations considered parities as different traits were distributed from 0.99 to －0.13. Such results indicated that reproductive traits for sows should be considered as different traits.
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KEYWORD
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Gibbs sampling, Genetic parameter, Total number of born, Pigs
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