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Journal of Dairy Science Vol. 42 No. 10 1666-1674
© 1959 by American Dairy Science Association ®
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Use of the Selection Index Method to Account for the Number of Daughters and Records in Progeny-Testing a Dairy Bull

S. R. Searle1

New Zealand Dairy Board, Wellington

ABSTRACT

Factors have been developed for taking account of the number of daughters and records in the progeny-test of a dairy bull. They are obtained by evaluating the regression of half the sire's additive genetic value on a function which compares the bull's daughter level to an expected daughter level. An extract from the table of the factors is given.

FOOTNOTES

1 Present address: Department of Animal Husbandry, Cornell University, Ithaca, New York.






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Copyright © 1959 by the American Dairy Science Association ®.