Genetic Parameter Estimation on the Growth and Carcass Traits in Hanwoo(Korean Cattle)

한우의 성장 및 도체형질에 대한 유전모수 추정

  • ;
  • ;
  • Salces, Agapita J (Animal Genetic Improvement Division, NLRI. RDA., Republic of Korea) ;
  • 최태정 (축산연구소) ;
  • 김시동 (축산연구소) ;
  • ;
  • 백동훈 (전북대학교)
  • Published : 2006.12.31


This study was conducted to investigate the genetic correlations among the traits used to select young bulls and proven bulls in Hanwoo Performance and Progeny Test Program in Korea. For the estimation of heritabilities and correlations among the growth traits of bulls and carcass traits of progeny steers, 2,532 records of performance tested bull calves and 1,819 records of progeny tested steers were collected from Livestock Improvement Main Center (LIMC), National Agricultural Cooperative Federation (NACF). Fixed effects of mixed model for each traits were selected by using stepwise regression analysis and prior values of variance components were estimated by MTDFREML. The prior values of variance components were estimated with pairwise 2 traits model followed by single trait analysis. The estimated heritability of backfat thickness(BF), dressing percentage(DP), loin-eye muscle area(LMA), marbling score(MS) and weight at 12 months(WT12) was 0.51, 0.32, 0.27, 0.33, 0.50 and 0.26, respectively. Genetic correlation of WT12 of bull calves with backfat thickness, carcass weight and loin-eye muscle area of steers was positive correlation as 0.05, 0.35 and 0.21, respectively. However genetic correlation of WT12 with DP and MS showed negative correlation as 󰠏0.09 and 󰠏0.27, respectively and these negative genetic correlations implies that bulls that may be superior in carcass traits can be lost at the first step of selection and current selection method should be modified to solve this problem.


Genetic parameter;MTDFREML;Hanwoo;Performance test;Progeny test


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