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Pattern of neutral polymorphism in a geographically structured population*

Published online by Cambridge University Press:  14 April 2009

Motoo Kimura  and
Takeo Maruyama
Motoo Kimura
Affiliation:
National Institute of Genetics, Mishima, Japan
Takeo Maruyama
Affiliation:
National Institute of Genetics, Mishima, Japan
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Summary

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In a two-dimensional stepping-stone model of finite size, if a pair of alleles happen to segregate in the whole population, marked local differentiation of gene frequencies can occur only if migration between colonies is sufficiently rare so that Nm < 1, where N is the effective size of each colony and m is the rate at which each colony exchanges individuals with four surrounding colonies each generation. On the other hand, if Nm ≥ 4, the whole population behaves as if it were panmictic and the allelic frequencies become uniform over the entire distribution range unless mutation is unusually high. Tendency toward local differentiation is much weaker in two-dimensional than in one-dimensional habitats.

Type
Research Article
Information
Genetics Research , Volume 18 , Issue 2 , October 1971 , pp. 125 - 131
Copyright
Copyright © Cambridge University Press 1971

References

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