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Journal of Animal Science, Vol 71, Issue 10 2614-2622, Copyright © 1993 by American Society of Animal Science

JOURNAL ARTICLE

Genetic parameters for growth traits of Australian beef cattle from a multibreed selection experiment

K. Meyer, M. J. Carrick and B. J. Donnelly
Animal Genetics and Breeding Unit, University of New England, Armidale, NSW, Australia.

Estimates of covariance components and genetic parameters were obtained for birth, weaning, 200-d, and 400-d weight for a herd of Polled Herefords and a herd of a multibreed synthetics, the so-called Wokalups. Data originated from an experiment in Western Australia selecting for preweaning growth rate. Analyses were carried out by REML fitting an animal model including genetic and permanent environmental maternal effects. Wokalups showed consistently more phenotypic variation, partly due to a scale effect, and higher direct and lower maternal heritabilities than Herefords. Maternal environmental effects were more than twice as important in Herefords than in Wokalups. Estimates of both genetic and environmental correlations among weaning and subsequent weights were essentially unity, identifying maternal effects found for postweaning weights as a "carry over" of those on weaning weight.


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M. A. Aziz, S. Nishida, K. Suzuki, and A. Nishida
Estimation of direct and maternal genetic and permanent environmental effects for weights from birth to 356 days of age in a herd of Japanese Black cattle using random regression
J Anim Sci, March 1, 2005; 83(3): 519 - 530.
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Copyright © 1993 by the American Society of Animal Science.