J. Anim Sci.
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J. Anim Sci. 1964. 23:1176-1181.
© 1964 American Society of Animal Science
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Subjective Live Appraisal of Beef Carcass Traits1

K. E. Gregory2, L. A. Swiger, B. C. Breidenstein3, V. H. Arthaud, R. B. Warren and R. M. Koch4

United States Department of Agriculture, University of Nebraska, Lincoln and University of Illinois, Urbana

Abstract

Two calf crops of 204 steers were subjectively evaluated for carcass traits at about 452 days of age. Evaluations were made by three graders immediately prior to slaughter. One hundred four and 100 steers were involved from the 1961 and 1962 calf crops, respectively. The steers were from nine breeding groups including Angus, Hereford and Shorthorn breeds and their six reciprocal crosses. Live estimates were made of dressing percent, fat thickness at the 12th rib, rib-eye area at the 12th rib, percent kidney fat, cutability (percent), and slaughter grade. Carcass data obtained on these steers included carcass weight, fat thickness at 12th rib, rib-eye area at 12th rib, estimated percent kidney fat, carcass grade, estimated cutability, and actual cutability.

The results of this study indicate that trained personnel can estimate group means accurately for cutability and carcass grade in live cattle. These results show that live cattle can be appraised more precisely for carcass cutability than for carcass grade.

Footnotes

1 Department of Animal Science, Published with the approval of the Director as Paper No. 1575, Journal Series, Nebraska Agricultural Experiment Station. Contribution from Regional Project NC-1, Improvement of Beef Cattle through Breeding Methods.

2 Beef Cattle Research Branch, Animal Husbandry Research Division, A.R.S., U.S.D.A., Lincoln, Nebraska.

3 Department of Animal Science, University of Illinois, Urbana.

4 Acknowledgment is made to George A. Hormel & Co., Fremont, Nebraska, and especially to Roger A. Orr for the cooperation received in obtaining carcass data.






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Copyright © 1964 by the American Society of Animal Science.