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Journal of Animal Science, Vol 69, Issue 2 490-497, Copyright © 1991 by American Society of Animal Science

JOURNAL ARTICLE

Biological type effects on postweaning growth, feed efficiency and carcass characteristics of steers

J. J. Urick, M. D. MacNeil and W. L. Reynolds
ARS, Fort Keogh Livest and Range Res. Lab., U.S. Department of Agriculture, Miles City, MT 59301.

Postweaning growth, feed consumption and carcass characteristics of 259 individually fed F1 Angus-, Red Poll-, Pinzgauer-, Simmental- and Tarentaise-sired steers from Hereford dams were compared. Average daily gain to 382 d of age for Simmental-sired steers exceeded (P less than .05) the ADG for Red Poll, Angus and Pinzgauer, which were not different. Tarentaise-sired steers were intermediate in growth rate. Simmental-sired steers required less (P less than .05) feed per kilogram of gain than Red Poll- and Angus-sired steers to reach either 382 d of age or 400 kg. Feed conversion (FC) by Simmental, Pinzgauer and Tarentaise-sired steers did not differ (P greater than .05), nor did FC by Red Poll- and Angus-sired steers to reach 382 d or 400 kg. Angus-sired steers required less ME per kilogram of gain to reach 12.7 mm of carcass backfat than did Red Poll-, Pinzgauer- or Tarentaise-sired steers, which were similar. Simmental-sired steers were intermediate in feed conversion to 12.7-mm fat depth and did not differ from the other breed groups. Rankings of breed groups for traits indicative of lean tissue growth were similar to rankings for live animal growth traits. At age- and weight-constant endpoints, Angus-sired steers had more (P less than .05) fat cover and marbling than did steers sired by the other breeds. At these endpoints, Red Poll-sired steers also had more (P less than .05) fat cover than did Pinzgauer-, Simmental- and Tarentaise-sired steers, which were similar.


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T. L. Wheeler, L. V. Cundiff, S. D. Shackelford, and M. Koohmaraie
Characterization of biological types of cattle (Cycle VII): Carcass, yield, and longissimus palatability traits
J Anim Sci, January 1, 2005; 83(1): 196 - 207.
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Copyright © 1991 by the American Society of Animal Science.