J. Anim Sci.
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Journal of Animal Science, Vol 73, Issue 12 3613-3620, Copyright © 1995 by American Society of Animal Science

JOURNAL ARTICLE

Feedlot performance, carcass traits, and palatability traits of Hereford and Hereford x Brahman steers

J. A. Sherbeck, J. D. Tatum, T. G. Field, J. B. Morgan and G. C. Smith
Department of Animal Sciences, Colorado State University, Fort Collins 80523, USA.

Short-yearling steer of known genotypes-straightbred Hereford (100H, n = 80) 75% Hereford x 25% Brahman (75H:25B, n = 80), and 50% Hereford x 50% Brahman (50H:50B, n = 80) were sampled serially at four time-on-feed endpoints (84, 98, 112, 126 d) to compare feedlot performance and carcass and palatability traits of Hereford and Hereford x Brahman steers. After slaughter, USDA yield grade and quality grade factors were recorded, and a portion of the longissimus muscle was removed from the left side of each carcass and fabricated into four 2.54-cm steaks for palatability analyses. Paired steaks from each carcass were aged (6 and 18 d after death), and sensory panel and shear force evaluations were performed. At a constant live weight, 100H steers had higher ADG and produced less mature carcasses with smaller longissimus muscle areas and higher marbling scores than did 75H:25B and 50H:50B steers. The 50H:50B steers had the highest (P < .05) values for dressing percentage. Loin steak tenderness and juiciness decreased (P < .05) and shear force values increased (P < .05) as the percentage of Brahman breeding increased. EXtending the postmortem aging period from 6 to 18 d improved shear force values by 20% and panel tenderness ratings by approximately 14%. Beef from steers of the three breeds responded similarly to aging. When Certified Hereford Beef (CHB) specifications were applied, steaks from 100H steers and 75H:25B steers had similar shear force values, suggesting that beef from quarter-blood Brahman crossbred steers could be included in the CHB Program without detrimental effects on product tenderness.


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T. D. Bidner, W. E. Wyatt, P. E. Humes, D. E. Franke, and D. C. Blouin
Influence of Brahman-derivative breeds and Angus on carcass traits, physical composition, and palatability
J Anim Sci, August 1, 2002; 80(8): 2126 - 2133.
[Abstract] [Full Text] [PDF]


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Copyright © 1995 by the American Society of Animal Science.