Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity.

Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Research Abstract Details 

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Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Abstract Text:

We show that a sex difference in the opportunity for selection results in sex differences in the strength of random genetic drift and thus creates different patterns of genetic diversity for maternally and paternally inherited haploid genes. We derive the effective population size Ne for a male-limited or female-limited haploid gene in terms of I, the "opportunity for selection" or the variance in relative fitness. Because the variance in relative fitness of males can be an order of magnitude larger than that of females, the Ne is much smaller for males than it is for females. We derive both nonequilibrium and equilibrium expressions for F(ST) in terms of I and show how the portion of I owing to sexual selection, Imates, that is, the variation among males in mate numbers, is a simple function of the F's for cytoplasmic (female inherited) and Y-linked (male inherited) genes. Because multiple, transgenerational data are lacking to apply the nonequilibrium expression, we apply only the equilibrium model to published data on Y chromosome and mitochondrial sequence divergence in Homo sapiens to quantify the opportunity for sexual selection. The estimate suggests that sexual selection in humans represents a minimum of 54.8% of total selection, supporting Darwin's proposal that sexual selection has played a significant role in human evolution and the recent proposal regarding a shift from polygamy to monogamy in humans.

Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Publishing Authors By Initials

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Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Evolution; international journal of organic evolut

VOLUME: 58

Page Numbers: 1613-6

Journal Abbreviation: Evolution

ISSN: 0014-3820

DAY: 4

MONTH: Jul

YEAR: 2004

Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Information

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LANGUAGE: eng

NlmUniqueID: 373224

Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Keywords Mesh Terms:

KEYWORDS: Variation (Genetics)

MESH TERMS: genetics

Chemical & Substance for Abstract: Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity. Information

Substance Name: DNA, Mitochondrial

Registry Number: 0

Grant and Affiliation Information for Estimating the strength of sexual selection from Y-chromosome and mitochondrial DNA diversity.

AFFILIATION: Department of Biology, Indiana University, Bloomington, Indiana 47405, USA. mjwade@indiana.edu

Country: United States

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MEDLINETA: Evolution

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