A clarification of historical concepts of effective population size and their applicability to subdivided populations.

Abstract excerpt

The great population geneticist Sewall Wright had a lifelong interest in animal breeding programs. He was concerned that, in these programs, genetic variation would tend to be lost (as measured by him in a tendency for genetic heterozygosity to decrease) when a small number of males is mated to a comparatively large number of females. The calculations in his great 1931 paper were designed to quantify this...

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