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The Journal of Heredity 1984:75(1):8-10
© 1984 The American Genetic Association 75:8-10

research-article

Changes in genetic variances with increased inbreeding of beef cattle

W. C. Russell, J. S. Brinks, and G. V. Richardson

Department of Animal Science, University of Wyoming Laramie, WY 80271
Department of Animal Science, Colorado State University Fort Collins, CO 80523
USDA Colorado State University Statistical Laboratory Fort Collins, CO 80523

Abstract

Data on performance traits from a herd of Hereford cattle composed of inbred lines and linecross groups were analyzed to estimate within- and among-line genetic variances and to evaluate how these variances changed with increased inbreeding. Within-line variances were highly erratic while among-line variances tended to be somewhat more consistent. Changes in variances with increased inbreeding did not generally follow the theoretical expectations for the redistribution of genetic variances.


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M. A. Cleveland, H. D. Blackburn, R. M. Enns, and D. J. Garrick
Changes in inbreeding of U.S. Herefords during the twentieth century
J Anim Sci, May 1, 2005; 83(5): 992 - 1001.
[Abstract] [Full Text] [PDF]


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