Am. Soc. Anim. Prod.
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A method of measuring performance in beef cattle

W. H. Black and Bradford Knapp, Jr.

Bureau of Animal Industry

Abstract

Several methods of evaluating beef sires by record of performance have been presented during the past few years. Holbert (1932) proposed a method based on show-ring winnings of the progeny of sires of the various breeds. Sheets (1932) proposed a procedure based on the feed-lot record of the progeny and a quality score based on carcass grade and tenderness. Winters (1933) proposed a method based on the average daily gain of the animal from birth to one year of age and a quality score based upon a slaughter grade as determined by a committee.

The procedure, used at the National Agricultural Research Center, Beltsville, Md., in brief, has been to wean at a constant age (252 days) and slaughter at a constant weight (900 pounds). The data accumulated during that period comprise complete records on 14 beef Shorthorn calves, 32 Milking Shorthorn calves, 20 Hereford calves, and six dairy-bred calves.






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