종돈의 경제 형질의 유전모수 추정에 관한 연구 = Estimation of Genetic Parameters for Economic Traits in Swine

다국어 초록 (Multilingual Abstract)

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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