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Journal of Dairy Science Vol. 66 No. 4 927-934
© 1983 by American Dairy Science Association ®
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Genetic Groups in Dairy Sire Evaluation under a Selection Model

T. R. Famula1, E. J. Pollak and L. D. Van Vleck

Animal Science Department, Cornell University, Ithaca, NY 14853

ABSTRACT

The frequently arbitrary application and definition of genetic groups makes sire grouping the "weak link" of the sire evaluation process. A selection model for records not in the model for observations is similar in form to the genetic groups model. Implications of this correspondence are discussed and illustrated through a small example. Guidelines for possible grouping strategies also are discussed.

FOOTNOTES

1 Animal Science Department, University of California, Davis 95616.






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Copyright © 1983 by the American Dairy Science Association ®.