J. Anim Sci.
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J. Anim Sci. 1971. 32:35-42.
© 1971 American Society of Animal Science
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Relationships between Direct and Maternal Effects on Growth in Herefords. III. Covariance of Paternal Half-Brother and Sister Performance1

W. D. Hohenboken2 and J. S. Brinks

Colorado State University, Fort Collins 80521

Abstract

A LARGE part of the beef calf's preweaning environment is maternally conditioned. Both the quantity and quality of protection and nourishment provided by the dam are influenced by her genotype and by the environments in which she developed and in which she expresses her maternal potential. Progeny growth is influenced by the calf's genotype for growth (direct effects) and the cow's genotype for maternal characters as well as by the two corresponding environmental influences. Maximizing production from the breeding of beef cattle involves the elucidation of the relative magnitudes of and the genetic and environmental relationships between the two effects.

Several European workers have studied the genetic relationship of growth and maternal characters in dairy or dual-purpose populations by correlating growth of sons with milk production of daughters of the same bull (Mason, 1964; Bar-Anan et al., 1965; Langlet, 1965). The study reported herein relates maternal ability of daughters to performance characters of sons in a purebred herd of Herefords.

Footnotes

1 Approved for publication as Scientific Paper 1514 of the Colorado Experiment Station. This study was conducted in cooperation with Western Regional Research Project W-I, Improvement of Beef Cattle Through of Breeding Methods.

2 Present address: Department of Genetics, University of Wisconsin, Madison 53706.






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Copyright © 1971 by the American Society of Animal Science.