J. Anim Sci.
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J. Anim Sci. 1977. 45:1131-1137.
© 1977 American Society of Animal Science
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Feedlot Performance and Carcass Traits of Progeny of Hereford, Hereford x Holstein and Holstein Cows1

R. D. Wyatt2, K. S. Lusby2, M. B. Gould3, L. E. Walters2, J. V. Whiteman2 and Robert Totusek2

Oklahoma Agricultural Experiment Station, Stillwater 74074 and and U.S. Department of Agriculture, El Reno 73036

Abstract

The effects of breed of dam on postweaning feedlot performance and carcass traits of 217 steer and heifer calves from Hereford, Hereford x Holstein and Holstein cows was determined. Calves were all sired by Charolais bulls and were produced in 2 successive years. Each year calves that had been reared to weaning on range were group-fed while calves that had been reared in drylot were individually-fed during the feedlot finishing period to a constant finish. Holstein progeny was heavier (P<.05) initially (55 kg) and at slaughter (104 kg) than their Hereford contemporaries. Holstein progeny was older at slaughter (64 days) and showed more skeletal height (P<.05 and length (P<.05) both initially and at slaughter than Hereford progeny. Crossbred progeny was intermediate with respect to these traits. As percentage of Holstein breeding increased, daily feed intake, total feed intake and feed required per kilogram of gain tended to increase. Holstein progeny produced carcasses which were 37 to 70 kg heavier (P<.05) than Crossbred and Hereford progeny. Superior muscling of Hereford progeny was indicated by a tendency toward higher cutabilities. Conformation scores tended to be lower for Holstein progeny when compared to Hereford or Crossbred progeny. Marbling scores and carcass grades of Holstein progeny were as high or higher than those for Hereford and Crossbred progeny.

Footnotes

1 Journal Article 3216 of the Agricultural Experiment Station, Oklahoma State University, Stillwater. This research was conducted by the Department of Animal Science in cooperation with the USDA Agricultural Research Service, Southern Region.

2 Department of Animal Science, Oklahoma State University, Stillwater 74074.

3 Superintendent, Southwestern Livestock and Forage Research Station, El Reno 73036.






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Copyright © 1977 by the American Society of Animal Science.