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KMID : 1025520130550050373
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Journal of Animal Science and Technology
2013 Volume.55 No. 5 p.373 ~ p.380
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Estimation of Primal Cuts Yields by Using Body Size Traits in Hanwoo Steer
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Lee Jae-Gu
Lee Seung-Soo
Cho Kwang-Hyun
Cho Chung-Il
Choy Yun-Ho
Choi Je-Gwan
Park Byoung-Ho
Na Jong-Sam
Noh Seung-Hee
Do Chang-Hee
Choi Tae-Jeong
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Abstract
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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.
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KEYWORD
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Primal cuts, Body measurement traits, Regression models, Hanwoo steers
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