Effects of carcass and physiochemical fat traits on carcass price of Japanese Black cattle
2008
Nishioka, T.(Osaka-fu. Research Inst. of Environment, Agriculture and Fisheries, Habikino (Japan)) | Ishizuka, Y. | Yasumatsuya, K. | Kume, S. | Irie, M.
This study was conducted to investigate the effects of carcass traits and physiochemical fat characteristics on carcass unit price of Japanese Black cattle. The carcass traits data of 1326 cattle were used and the fatty acid profiles of subcutaneous and intermuscular fats of 144 cattle were examined. The multiple regression analysis, performed on standardized carcass unit price as a dependent variable and only carcass traits as independent variables, showed that the partial regression coefficients of BMS number and beef meat firmness grade were high (0.607, 0.212, respectively). Meanwhile, there were little variation in two carcass fat traits (beef fat color score and beef fat brightness and quality grade), and their partial regression coefficients were small (0.049, -0.029, respectively). The fatty acid profile of the carcass fats showed wide fluctuations and the multiple regression analysis using carcass traits and fatty acid composition of subcutaneous fats as independent variables showed that the monounsaturated fatty acid concentration might slightly influence carcass unit price. But its effect depended on BMS number. The subcutaneous fats of the carcasses with higher carcass unit prices than the estimates from several carcass traits, showed lower monounsaturated fatty acid concentration compared to those of the carcasses with lower carcass unit prices (P0.05). These results indicate that BMS number is still the most important carcass trait affecting the unit price, and that fatty acid profile also affects the unit price of Japanese Black cattle.
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