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Genetics. Mar 1974; 76(3): 601–606.
PMCID: PMC1213089

Natural Selection for within-Generation Variance in Offspring Number


In this paper it is shown that natural selection can act on the within-generation variance in offspring number. The fitness of a genotype will increase as its variance in offspring number decreases. The intensity of selection on the variance component is inversely proportional to population size, although the fixation probability of a gene which differs from its allele only in the variance in its offspring number is independent of population size. The concept of effective population size is shown to be of limited use when there is genetic variation in the variance in offspring number.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Ewens WJ. Concepts of substitutional load in finite populations. Theor Popul Biol. 1972 Jun;3(2):153–161. [PubMed]
  • Karlin S, McGregor J. DIRECT PRODUCT BRANCHING PROCESSES AND RELATED MARKOV CHAINS. Proc Natl Acad Sci U S A. 1964 Apr;51(4):598–602. [PMC free article] [PubMed]
  • Kimura M. Process Leading to Quasi-Fixation of Genes in Natural Populations Due to Random Fluctuation of Selection Intensities. Genetics. 1954 May;39(3):280–295. [PMC free article] [PubMed]

Articles from Genetics are provided here courtesy of Genetics Society of America


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