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A note on Fisher's ‘average effect’ and ‘average excess’

Published online by Cambridge University Press:  14 April 2009

D. S. Falconer
Affiliation:
Department of Genetics, West Mains Road, Edinburgh, EH9 3JN, Scotland
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The average effect and average excess of a gene substitution are formulated in terms of gene frequencies and inbreeding coefficient. This clarifies their meanings and shows how each is affected by non-random mating. The meanings of various definitions are examined, and one commonly used definition of average effect is found to be invalid with non-random mating. The concept of breeding value is shown to have no useful meaning when mating is not random.

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Type
Research Article
Copyright
Copyright © Cambridge University Press 1985