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On selection among groups with heterogeneous variance

Published online by Cambridge University Press:  02 September 2010

W. G. Hill
W. G. Hill
Affiliation:
Institute of Animal Genetics, University of Edinburgh, West Mains Road, Edinburgh EH9 3JN
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Abstract

Problems of making selection decisions among animals from several environmental groups with heterogeneous variance are discussed. Unless correction for heterogeneity of variance is made, animals will tend to be selected from the more variable groups, especially if selection is intense. This is an accurate and fair procedure only when the heterogeneity reflects real differences in heritability. It is shown that, if observations are expressed as deviations relative to the estimate of standard deviation from the group, the accuracy is high unless groups are very small.

Type
Research Article
Information
Animal Production , Volume 39 , Issue 3 , December 1984 , pp. 473 - 477
Copyright
Copyright © British Society of Animal Science 1984

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References

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