J. Anim Sci.
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J. Anim Sci. 1945. 4:146-150.
© 1945 American Society of Animal Science
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Breeding Systems used to Produce the Highest Yielding Guernsey and Holstein Cows

S. A. Asdell

Cornell University1

Abstract

The breeding of the hundred highest fat-yielding Guernsey cows and the hundred highest milk yielding Holstein cows were analyzed to obtain their coefficients of inbreeding and to find whether they had been produced to a greater degree by any one method of breeding.

The average coefficient of inbreeding found in each case was close to that of the breed as a whole. No system of breeding was especially noteworthy in the production of these superior animals, but there is a suggestion that reduction of strong inbreeding is an advantage. It was found that superiority of the parents was more important than the system of breeding followed.

Footnotes

1 Laboratory of Animal Nutrition, Ithaca, N. Y.






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Copyright © 1945 by the American Society of Animal Science.