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The effects of inbreeding on carcass traits in the bacon pig

Published online by Cambridge University Press:  01 September 1959

J. W. B. King  and
R. C. Roberts
J. W. B. King
Affiliation:
A.R.C. Animal Breeding Research Organisation, Edinburgh, 9
R. C. Roberts
Affiliation:
A.R.C. Animal Breeding Research Organisation, Edinburgh, 9
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Extract

Carcass measurements made on 1,463 Large White pigs from 88 inbred lines, at various degrees of inbreeding, have been analysed.

Partial regression coefficients calculated within lines showed that each 10% increase in inbreeding coefficient significantly increased carcass weight by 0·46 lb., decreased mid-back fat thickness by 0·37 mm. and streak thickness by 0·36 mm.

Partial regression coefficients calculated on all the material, or on line means showed, however, that the most highly inbred pigs tended to be shorter and fatter than average. Possible explanations of this finding are discussed and it is suggested that under the selection procedure adopted for litter size and weaning, weight favours the survival of these less desirable lines.

Type
Research Article
Information
Animal Production , Volume 1 , Issue 2 , September 1959 , pp. 123 - 127
Copyright
Copyright © British Society of Animal Science 1959

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References

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