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Journal of Dairy Science Vol. 82 No. 4 802-809
© 1999 by American Dairy Science Association ®
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Combining Selection for Carcass Quality, Body Weight, and Milk Traits in Dairy Cattle

A.-E. Liinamo 1 and J.A.M. Van Arendonk 2

1 Department of Animal Science, PO Box 28, FIN-0014 Helsinki University, Helsinki, Finland
2 Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen Agricultural University, PO Box 338, 6700 AH Wageningen, The Netherlands

Alternative selection strategies were evaluated for breeding for carcass quality, body weight, and milk traits in dairy cattle. The efficiency of different alternatives was evaluated by comparing predicted genetic responses in individual traits as well as in the aggregate genotype. Particular interest was paid to the loss of response with indices that partially or totally ignored genetic correlations between traits, reflecting selection on single-trait evaluations. Simplified indices gave almost the same total response as a full multiple-trait index, but relative responses in carcass and milk traits differed between indices. Also studied were the consequences of restricting increase in body weight of dairy cows, while selecting for carcass and milk production traits. Restriction of body weight of cows resulted in considerable loss of predicted total response.

Key Words: carcass traits • body weight • dairy cattle • selection

Submitted on June 15, 1998
Accepted on November 23, 1998






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