Animal Science Department

 

Date of this Version

January 1982

Comments

Published in JOURNAL OF ANIMAL SCIENCE, Vol. 54, No. 5, 1982. Copyright © 1982 American Society of Animal Science. Used by permission.

Abstract

Weaning weight records on 47,652 calves in 371 contemporary groups were obtained from the South Dakota Beef Cattle Improvement Association and used to estimate breed individual and maternal additive effects and heterotic effects on 205-d weight. A mixed model was used. Individual additive effects were -22.6 ± 1.3 kg for Red Angus, -19.0 ± 1.1 for Hereford, -12.2 ± .9 for Angus, -11.5 ± 3.1 for Polled Hereford, -10.1 ± 2.2 for Shorthorn, -7.5 ± 4.9 for Tarentaise, 5.3 ± 1.6 for Gelbvieh, 9.5 ± 1.8 for Limousin, 11.4 ± 3.1 for Chianina, 12.4-± 1.2 for Charolais, 14.6 ± 1.2 for Simmental, and 29.7 ± 3.1 for Maine Anjou. Maternal additive effects were -18.9 ± 2.9 kg for Polled Hereford, -9.2 ± 2.6 for Shorthorn, -6.4 ± 1.0 for Hereford, .3 ± .9 for Angus, 6.3 ± 1.3 for Charolais, 11.0 ± 2.0 for Red Angus, and 16.9 ± 2.0 for Simmental. Pooled estimates of individual and maternal heterosis were 4.4 ± ,4 and 6.8 ± .4 kg, respectively.

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