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Estimation of Primal Cuts Yields by Using Body Size Traits in Hanwoo Steer

한우 후대검정우의 체척형질을 통한 부분육 생산량 추정

  • 이재구 (농촌진흥청 국립축산과학원) ;
  • 이승수 (농촌진흥청 국립축산과학원) ;
  • 조광현 (농촌진흥청 국립축산과학원) ;
  • 조충일 (농촌진흥청 국립축산과학원) ;
  • 최연호 (농촌진흥청 국립축산과학원) ;
  • 최재관 (농촌진흥청 국립축산과학원) ;
  • 박병호 (농촌진흥청 국립축산과학원) ;
  • 나종삼 (전북대학교 동물생명공학과) ;
  • 노승희 (농협중앙회 한우개량사업소) ;
  • 도창희 (충남대학교 농업생명과학대학) ;
  • 최태정 (농촌진흥청 국립축산과학원)
  • Received : 2013.07.09
  • Accepted : 2013.09.17
  • Published : 2013.10.31

Abstract

The study aimed to develop prediction models of primal cut yield using body measurements of Hanwoo steers in Korea. The progeny of 874 steers at Hanwoo Improvement Main Center from 2008 to 2010 were recorded. Pearson's correlation coefficients for primal cuts and other traits were estimated. Primal cuts were adjusted for slaughter date and age using the SAS GLM procedure. Afterwards, a stepwise regression was performed on each primal cut by fitting body measurement traits. An independent covariable was selected at the highest coefficient of determination with the greater fitness model using Mallows's Cp statistic. Results showed that primal cuts were significantly influenced by slaughter date (P<0.01). The age at slaughter, however, was only significant for the top round (P<0.05). There was a moderate to high correlation between chest girth and tenderloin (0.54), loin (0.74), and rib (0.80). Most primal cut percentages were negatively related to BFT. Similar negative to low positive correlations were observed for primal cut percentage and body size traits. In addition, a correlation of 0.21 was observed between rib percentage and chest girth. The regression of body measurements on the adjusted primal cuts were significant for later traits. Regression estimates revealed that wither height, body length, rump length, hip bone width, and chest girth are important for primal cut weight and percentage determination. In particular, chest girth was always important for primal cut weight estimates.

Keywords

Primal cuts;Body measurement traits;Regression models;Hanwoo steers

Acknowledgement

Grant : 한우 유전능력평가 기법 및 환류체계 개발

Supported by : 국립축산과학원

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Cited by

  1. A Study on Genetic Parameters of Primal Cuts and Body Size Traits in Hanwoo Steers vol.48, pp.6, 2014, https://doi.org/10.14397/jals.2014.48.6.151
  2. Expected Genetic Progress of Primal Cut Weights and Percentages by Different Selection Index Weights in Hanwoo vol.49, pp.5, 2015, https://doi.org/10.14397/jals.2015.49.5.179