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A comparison of ‘on-farm’ and station testing in pigs

Published online by Cambridge University Press:  02 September 2010

D. J. Roberts  and
M. K. Curran
D. J. Roberts
Affiliation:
Wye College, University of London, Ashford, Kent TN25 5AH
M. K. Curran
Affiliation:
Wye College, University of London, Ashford, Kent TN25 5AH
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Abstract

Data were extracted from Meat and Livestock Commission records from 44 herds with 392 progeny-tested sires in both farm and station environments. The farm data contained 4182 and 17 251 male and female progeny respectively, and the station data 2982 and 1490 male and female progeny respectively. Both sets of data were adjusted separately for the effects of month of test within sex. The farm data were also corrected to a constant end-of-test-weight corresponding to that at the station. Comparisons were made between both different and the same sexes in the two environments. Phenotypic correlations between a simple index measure in both environments ranged from +0·20 (farm females:station males) to +0·30 (farm females:station females). Genetic correlations between similar traits ranged from –018 (weight/age, farm males:station females) to +081 (simple index, farm males:station females). The correlations between female farm progeny and station male progeny were generally lower than for any other comparisons.

Type
Research Article
Information
Animal Production , Volume 33 , Issue 3 , December 1981 , pp. 291 - 297
Copyright
Copyright © British Society of Animal Science 1981

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References

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