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A comparison of reciprocal progeny tests amongst Holstein-Friesian sires from Canada and the United States of America

Published online by Cambridge University Press:  02 September 2010

C. J. M. Hinks  and
A. Zarnecki
C. J. M. Hinks
Affiliation:
ARC Animal Breeding Research Organisation, Edinburgh
A. Zarnecki
Affiliation:
Institute of Animal Genetics, Edinburgh
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Summary

The test proofs of 29 Holstein-Friesian sires (12 Canadian and 17 US) with milking daughters in both Canada and the USA were compared. The mean test rating of the Canadian and US sires respectively was 125±74 kg and 265±57 kg higher in Canada than in the United States.

These results were supported by others obtained in milking trials in Denmark and West Germany.

The fat percentage of US Holstein progeny was higher in Canada and Europe than in the USA, suggesting that the low fat percentage of the US Holstein in its country of origin cannot be attributed simply to lack of genetic potential.

It is suggested that the US Holstein be considered as a substitute for the Canadian for the improvement of milking performance in European Friesian populations.

Type
Research Article
Information
Animal Production , Volume 18 , Issue 3 , June 1974 , pp. 223 - 229
Copyright
Copyright © British Society of Animal Science 1974

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References

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