title: Estimation of relative economic weights of hanwoo carcass traits based on carcass market price.
abstract: The objective of this study was to estimate economic weights of Hanwoo carcass traits that can be used to build economic selection indexes for selection of seedstocks. Data from carcass measures for determining beef yield and quality grades were collected and provided by the Korean Institute for Animal Products Quality Evaluation (KAPE). Out of 1,556,971 records, 476,430 records collected from 13 abattoirs from 2008 to 2010 after deletion of outlying observations were used to estimate relative economic weights of bid price per kg carcass weight on cold carcass weight (CW), eye muscle area (EMA), backfat thickness (BF) and marbling score (MS) and the phenotypic relationships among component traits. Price of carcass tended to increase linearly as yield grades or quality grades, in marginal or in combination, increased. Partial regression coefficients for MS, EMA, BF, and for CW in original scales were +948.5 won/score, +27.3 won/cm(2), -95.2 won/mm and +7.3 won/kg when all three sex categories were taken into account. Among four grade determining traits, relative economic weight of MS was the greatest. Variations in partial regression coefficients by sex categories were great but the trends in relative weights for each carcass measures were similar. Relative economic weights of four traits in integer values when standardized measures were fit into covariance model were +4:+1:-1:+1 for MS:EMA:BF:CW. Further research is required to account for the cost of production per unit carcass weight or per unit production under different economic situations.
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Yun Ho
authors: YH
authors: Choy
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Byoung Ho
authors: BH
authors: Park
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Tae Jung
authors: TJ
authors: Choi
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Jae Gwan
authors: JG
authors: Choi
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Kwang Hyun
authors: KH
authors: Cho
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Seung Soo
authors: SS
authors: Lee
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: You Lim
authors: YL
authors: Choi
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Kyung Chul
authors: KC
authors: Koh
authors: Korea Institute for Animal Products Quality Evaluation, Dang-dong 424-6, Gunpo 435-010, Korea .
authors: Hyo Sun
authors: HS
authors: Kim
keywords: Carcass Trait; Economic Weight; Hanwoo; Selection Index