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A genetic model of interpopulation variation and covariation of quantitative characters

Published online by Cambridge University Press:  14 April 2009

Zhao-Bang Zeng
Zhao-Bang Zeng
Affiliation:
Department of Statistics, North Carolina State University, Box 8203, Raleigh, NC 27695-8203USA
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Summary

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Evolutionary consequences of natural selection, migration, genotype–environment interaction, and random genetic drift on interpopulation variation and covariation of quantitative characters are analysed in terms of a selection model that partitions natural selection into directional and stabilizing components. Without migration, interpopulation variation and covariation depend mainly on the pattern and intensities of selection among populations and the harmonic mean of effective population sizes. Both transient and equilibrium covariance structures are formulated with suitable approximations. Migration reduces the differentiation among populations, but its effect is less with genotype–environment interaction. In some special cases of genotype–environment interaction, the equilibrium interpopulation variation and covariation is independent of migration.

Type
Research Article
Information
Genetics Research , Volume 53 , Issue 3 , June 1989 , pp. 215 - 221
Copyright
Copyright © Cambridge University Press 1989

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