J. Anim Sci.
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J. Anim Sci. 1970. 30:182-185.
© 1970 American Society of Animal Science
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Effect of Sire, Sex and Sire X Sex Interactions on Beef Cattle Performance and Carcass Traits1,2,

F. A. Thrift, D. D. Kratzer, J. D. Kemp, N. W. Bradley and W. P. Garrigus

University of Kentucky, Lexington

Abstract

Data utilized in this study were collected in cooperation with a commercial Hereford farm. Eight Hereford bulls were each exposed to 27 to 30 grade Hereford cows during the early spring of 1966. Seventy-eight calves were randomly selected within sex and placed on postweaning feeding test to evaluate differences among the eight sires with respect to certain performance and carcass traits. The data were analyzed using a model that included the effects of sire, sex and sire x sex. Sire was a significant source of variation for weaning weight and grade, preweaning average daily gain, cold carcass weight, carcass weight per day of age, ribeye area/100 kg carcass, estimated boneless, trimmed retail cuts, fat thickness at 12th rib and estimated percent kidney and pelvic fat. Sex of calf was a significant source of variation for all performance traits and all carcass traits except marbling score and dressing percent. The sire x sex interaction was not significant for any of the performance or carcass traits.

Footnotes

1 Published with the approval of the Director of the Kentucky Agricultural Experiment Station as Journal Article 69-5-53.

2 A publication of Southern Regional Beef Cattle Breeding Project S-10.






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Copyright © 1970 by the American Society of Animal Science.