J. Anim Sci.
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J. Anim Sci. 1986. 62:399-406.
© 1986 American Society of Animal Science
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Effects of Anabolic Implants and Breed Group on Carcass Traits and Palatability Characteristics of Bullock Beef1

R. C. Johnson, D. H. Gee, W. J. Costello and C. W. Carlson2

South Dakota State University, Brookings 57007

Abstract

A total of 199 young bulls (avg 247 kg) representing two breed groups, straightbred Angus and Gelbvieh crossbreds, was assigned to four experimental treatments as follows: (1) nonimplanted, and implanted at d 1 and 100 with either (2) Ralgro, (3) Synovex-H or (4) Synovex-S. Treatment had no effect on hot carcass weight, longissimus muscle area, estimated kidney, pelvic and heart (KPH) fat, maturity score, marbling score or USDA quality grade. The two Synovex groups were fatter (P<.01) than the nonimplanted group. Nonimplanted and Ralgro-implanted bulls had more desirable (P<.01) USDA yield grades than Synovex-S-implanted males. Breed groups differed significantly for all carcass traits evaluated except estimated KPH fat. The Gelbvieh crossbreds showed an advantage (P<.01) in USDA yield grades, whereas the Angus carcasses had higher (P<.01) USDA quality grades due to higher (P-C.01) marbling scores. Longissimus muscle samples of the Synovex-S group had more (P<.05) fat and less (P<.01) water than the other three treatment groups. Longissimus muscle composition percentages indicated that Gelbvieh had less (P<.01) fat and more (P<.01) water and protein than Angus. Although both breed groups received acceptable scores for all palatability traits, breed group differences in taste-panel scores favored Angus over Gelbvieh crosses for tenderness (P<.01), amount of connective tissue (P<.01) and overall desirability (P<.05). Core samples from Angus bullock rib steaks required less (P<.01) shear force than samples from Gelbvieh crossbred rib steaks.

Footnotes

1 Published with the approval of the Director of the South Dakota Agr. Exp. Sta. as Pub. No. 2040 of the Journal Series.

2 Dept. of Anim. and Range Sci.






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Copyright © 1986 by the American Society of Animal Science.