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Selection for prolificacy in pigs

Published online by Cambridge University Press:  22 November 2017

E. Avalos ,
C. Smith  and
M. Bichard
E. Avalos
Affiliation:
ARC Animal Breeding Organisation, West Mains road, Edinburgh EH9 3JN
C. Smith
Affiliation:
ARC Animal Breeding Organisation, West Mains road, Edinburgh EH9 3JN
M. Bichard
Affiliation:
Pig Improvement Co., Fyfield Wick, Abingdon, OxfordshireOX13 5NA
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Extract

Pigs can be bred at 6 months of age. By this time it is possible for their dams to have two litter records (at 12 months and 18 months of age) on which selection for litter size can be based. Hence, a generation interval of one year for both males and females can be achieved. Ollivier (1974), has shown that this system maximizes the rates of response. The accuracy with which replacements are chosen can be increased further by including information from other relatives (dam and sire family) in a selection index.

Type
Genetics
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1984 , March 1984 , pp. 43
Copyright
Copyright © The British Society of Animal Production 1984

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References

Ollivier, L. 1974. Optimum replacement rates in animal breeding. Anim. Prod. 19:257–271.Google Scholar