J. Anim Sci.
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J. Anim Sci. 1972. 35:502-506.
© 1972 American Society of Animal Science
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Influence of Herd, Sire and Herd x Sire Interactions on Live and Carcass Characters of Beef Cattle1

L. L. Wilson2, 3,, W. H. Rishel2, 4, and W. R. Harvey2, 5,

The Pennsylvania State University, University Park 16802 and The Ohio State University, Columbus 43210

Abstract

Data obtained in a progeny test of Angus and Hereford bulls, each replicated in different herds of each breed, were analyzed to determine year, herd, sire and herd X sire:year effects. Different sires were represented each year. Weaning records were available on a total of 976 steers from 55 sires, with post-weaning and carcass data on 486 progeny from 30 sires. Year and herd effects were significant (P<.01) for most characters, and sire effects were significant (P<.05 or P<.01) for all characters except birth weight, weaning grade, kidney and pelvic fat percent, and carcass quality grade. None of the characters was significantly influenced by the herd X sire interaction, indicating these two main effects were essentially additive. Linear regressions of birth weight, weaning weight, post-weaning average daily gain and 365-day weight on weaning age were significant (P<.05 or P<.01) and negative within the Angus data and negative for 365-day weight within the Hereford data, although weaning and 365-day weights had been previously adjusted to a standard age.

Footnotes

1 Authorized for publication October 4, 1971 as Paper No. 4071 in the Journal Series of the Pennsylvania Agricultural Experiment Station.

2 The authors express appreciation to R. R. Woodward, Director, Beef Breeding Program, American Breeders Service, DeForrest, Wisconsin, for providing the data for this study.

3 Department of Animal Science, The Pennsylvania State University.

4 Present address: Sayre Farm, Phelps, New York; former NSF Fellow.

5 Department of Dairy Sciences, The Ohio State University.






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