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Adipose tissue chemical composition and carcass traits related to bovine carcass composition



Adipose tissue chemical composition and carcass traits related to bovine carcass composition



Journal of Animal Science 47(3): 606-614



Adipose chemical composition of loin fat (LF), round fat (RF) and brisket deckle fat (BF) was evaluated on 148 steer carcasses from Angus and Hereford dams mated to Angus, Hereford, Brahman, Sahiwal and Pinzgauer sires, and Angus dams mated to Tarentaise sires. Steers were slaughtered in 3 groups with 1/3 of each breed cross slaughtered each time. The 2nd and 3rd slaughter groups were fed 28 and 56 days longer, respectively, than the 1st group. Right sides of all carcasses were processed into closely trimmed retail cuts and 9-10-11th rib sections were analyzed for moisture, protein and lipid. Regression equations with R2 > .85 were obtained when adipose tissue chemical composition was included in the models, but adipose tissue chemical composition contributed little in predicting carcass composition. Twelfth rib longissimus width and lipid percentage were important variables in most regression models.

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