Effect of Certain factors on Weaning Weight of Beef Calves

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Abstract
Weaning weight in beef cattle is a complex trait since it reflects not only the growth ability of the calf but also the maternal environment created for the calf by its dam. Further, this weight is subject to other influences such as sex of the calf and age of dam that are not easily controlled under existing management systems. Even so, the traditional 205-day weaning weight is of economic importance to the beef industry and is the logical first step in a performance program. Sex and age of dam effects have been examined extensively (Brinks et al., 1961; Brinks et al., 1962; Cundiff, Willham and Pratt, 1966; Marlowe, Mast and Schalies, 1965; Swiger, 1960; United States Beef Cattle Records Committee Report, 1965). However, only limited research exists on the interaction among factors influencing weaning weight (Cundiff, Willham and Pratt, 1966; Harwin, Brinks and Stonaker, 1966). Field data, which are now becoming available through performance programs, offer a way to investigate the appropriateness of the adjustment factors currently being used over a wide range of environments and management systems. Copyright © 1970. American Society of Animal Science . Copyright 1970 by American Society of Animal Science

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