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http://dx.doi.org/10.5713/ajas.2013.13109

Effect of Carcass Traits on Carcass Prices of Holstein Steers in Korea  

Alam, M. (National Institute of Animal Science, RDA)
Cho, K.H. (National Institute of Animal Science, RDA)
Lee, S.S. (National Institute of Animal Science, RDA)
Choy, Y.H. (National Institute of Animal Science, RDA)
Kim, H.S. (Korea Institute for Animal Products Quality Evaluation)
Cho, C.I. (National Institute of Animal Science, RDA)
Choi, T.J. (National Institute of Animal Science, RDA)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.26, no.10, 2013 , pp. 1388-1398 More about this Journal
Abstract
The present study investigated the contribution of carcass traits on carcass prices of Holstein steers in Korea. Phenotypic data consisted of 76,814 slaughtered Holsteins (1 to 6 yrs) from all over Korea. The means for live body weight at slaughter (BWT), chilled carcass weight (CWT), dressing percentage (DP), quantity grade index (QGI), eye muscle area (EMA), backfat thickness (BF) and marbling score (MS), carcass unit price (CUP), and carcass sell prices (CSP) were 729.0 kg, 414.2 kg, 56.79%, 64.42, $75.26cm^2$, 5.77 mm, 1.98, 8,952.80 Korean won/kg and 3,722.80 Thousand Korean won/head. Least squares means were significantly different by various age groups, season of slaughter, marbling scores and yield grades. Pearson's correlation coefficients of CUP with carcass traits ranged from 0.12 to 0.62. Besides, the relationships of carcass traits with CSP were relatively stronger than those with CUP. The multiple regression models for CUP and CSP with carcass traits accounted 39 to 63% of the total variation, respectively. Marbling score had maximum economic effects (partial coefficients) on both prices. In addition, the highest standardized partial coefficients (relative economic weights) for CUP and CSP were calculated to be on MS and CWT by 0.608 and 0.520, respectively. Path analyses showed that MS (0.376) and CWT (0.336) had maximum total effects on CUP and CSP, respectively; whereas BF contributed negatively. Further sub-group (age and season of slaughter) analyses also confirmed the overall outcomes. However, the relative economic weights and total path contributions also varied among the animal sub-groups. This study suggested the significant influences of carcass traits on carcass prices; especially MS and CWT were found to govern the carcass prices of Holstein steers in Korea.
Keywords
Carcass Weight; Marbling Score; Carcass Unit Price; Carcass Sell Price; Holstein Steer;
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