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KMID : 1025520040460020145
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Journal of Animal Science and Technology
2004 Volume.46 No. 2 p.145 ~ p.154
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Estimation of Genetic Parameters for Economic Traits in Swine
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최진성/Choi, C. S.
이일주/조규호/서강석/이정규/Lee, I. J./Cho, K. H./Seo, K. S./Lee, J. G.
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Abstract
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This study was conducted to estimate genetic parameter of Duroc, Landrace and Yorkshire breeds based on the on-farm performance tested records of 57,316 pigs under the supervision of Korean Animal Improvement Association from 1992 to 1999. Genetic parameters were estimated with a multiple trait animal model by using DF-REML. The result obtained in this study was summarized as follow;
The estimated heritabilities of Duroc, Landrace and Yorkshire were 0.46~0.65 for the average backfat thickness, 0.28~0.31 for loin depth, 0.50~0.60 for percent lean, 0.45~0.55 for the average daily gain, 0.38~0.50 for age at 90㎏, respectively.
Phenotypic correlation of average backfat thickness with loin depth, percent lean, average daily gain and age at 90㎏ for the three breeds were -0.12~-0.01, -0.81~-0.76, 0.34~0.46, and -0.41~-0.33, respectively. Phenotypic correlation of loin depth with percent lean, average daily gain and age at 90㎏ were 0.12~0.23, 0.03~0.21, and -0.17~-0.03, respectively. Phenotypic correlation of percent lean with average daily gain and age at 90㎏ were -0.37~-0.26 and 0.26~0.35, respectively. Phenotypic correlation of average daily gain with age at 90㎏ was -0.97~-0.95.
The estimated genetic correlation coefficients fo average backfat thickness with loin depth, percent lean, average daily gain and age at 90㎏ estimated for the three breeds were -0.17~0.03, -0.79~-0.69, 0.24~0.45 and -0.41~-0.19, respectively. The estimated genetic correlation coefficients of loin depth with percent lean, average daily gain and age at 90㎏ were 0.11~0.19, 0.23 and -0.30~-0.20, respectively. The estimated correlation coefficients of percent lean with average daily gain and age at 90㎏ were -0.36~-0.13 and 0.10~0.34, respectively. The estimated genetic correlation coefficients of average daily gain with age at 90㎏ was -0.96~-0.95.
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