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Flock Size and Flock Duration of Lowland Breeds of Sheep

Published online by Cambridge University Press:  06 May 2016

G. Wiener
G. Wiener*
Affiliation:
Animal Breeding Research Organisation, Edinburgh
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Extract

The number of breeding sheep in a flock and the number of generations under selection will directly affect the genetic improvement possible. Both in cattle (Donald and El Itriby, 1945, 1946) and in pigs (Donald and Auerbach, 1942) a small average herd size and short life were found to have set severe limits to the breeding policies possible. The present report discusses this problem in lowland registered sheep flocks.

Type
Research Article
Information
Proceedings of the British Society of Animal Production , Volume 1954 , 1954 , pp. 59 - 62
Copyright
Copyright © The British Society of Animal Production 1954

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References

Donald, H. P., & Auerbach, C., 1942. The duration and extent of pedigree breeding in herds of Large White pigs as a factor in breed improvement. Emp. J. exp. Agric 10 : 232.Google Scholar
Donald, H. P., & El Itriby, A. A., 1945. Herd size and its genetical significance in pedigree cattle breeding. J. agric. Sci. 35 : 84.Google Scholar
Donald, H. P., & El Itriby, A. A., 1946. The duration of pedigree herds in three breeds of cattle in relation to selective breeding. Ibid., 36 : 100.Google Scholar