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Selection of dairy bulls on half-sister records

Published online by Cambridge University Press:  02 September 2010

J. B. Owen
J. B. Owen
Affiliation:
School of Agriculture, Aberdeen
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Summary

A scheme is described for the genetic improvement of milk yield in a large population of dairy cows, based on half-sister selection of young bulls, as an alternative to the normal procedure of progeny testing. The results indicate that the suggested scheme would lead t o an eventual rate of genetic progress very similar to the progeny testing scheme. However, the annual cost of the new scheme is less than a progeny testing scheme, largely because the ‘laying off’ of candidate bulls, to await selection, is completely eliminated. In addition, improvement of the dairy cows shows up sooner in the new scheme; by the 10th year from the start the cumulative genetic improvement is four times greater than for progeny testing.

Type
Research Article
Information
Animal Production , Volume 20 , Issue 1 , February 1975 , pp. 1 - 10
Copyright
Copyright © British Society of Animal Science 1975

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References

REFERENCES

Bar-Anan, R. 1973. The Israeli dairy cattle improvement scheme. Proc. Br. Cattle Breeders' Club Winter Conf., 1972, pp. 41–43.Google Scholar
Hill, W. G. 1971. Investment appraisal for national breeding schemes. Anim. Prod. 13: 37–50.Google Scholar
Hill, W. G. 1974. Prediction and evaluation of response to selection with overlapping generations. Anim. Prod. 18: 117–140.Google Scholar
Hinks, C. J. M. 1971. The genetic and financial consequences of selection amongst dairy bulls in artificial insemination. Arum. Prod. 13: 209–218.Google Scholar
Johansson, I. and Rendel, J. M. 1972. Genetics and Animal Breeding. Oliver and Boyd, Edinburgh.Google Scholar
Miller, P. 1969. Relating progeny superiority to genetic trend in cattle. J. Anim. Sc. 28: 577–583.CrossRefGoogle ScholarPubMed
Robertson, A. and Rendel, J. M. 1950. The use of progeny testing with artificial insemination on dairy cattle. J. Genet. 50: 21–31.CrossRefGoogle ScholarPubMed
Searle, S. R. 1961. Estimating herd improvement from selection programs. J. Dairy Sci. 44: 1103–1112.CrossRefGoogle Scholar
Skjervold, H. 1963. The optimum size of progeny groups and optimum use of young bulls in A. I. breeding. Acta Agric. scand. 13: 131–140.CrossRefGoogle Scholar
Skjervold, H. 1973. Designing A.I. programmes in Norway. Proc. Br. Cattle Breeders' Club Winter Conf., 1972, pp. 19–33.Google Scholar
Van Vleck, L. D. 1964. Sampling the young sire in artificial insemination. J. Dairy Sci. 47: 441–446.CrossRefGoogle Scholar