Genetic variation in a heterogeneous environment. I. Temporal heterogeneity and the absolute dominance model

P. W. Hedrick

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

The conditions for a stable polymorphism and the equilibrium gene frequency in an infinite population are compared when there is spatial or temporal environmental heterogeneity for the absolute dominance model. For temporal variation the conditions for stability are more restrictive and the equilibrium gene frequency is often at a low gene frequency. In a finite population, temporal environmental heterogeneity for the absolute dominance model was found to be quite ineffective in maintaining genetic variation and is often less effective than no selection at all. For comparison, the maximum maintenance for temporal variation is related to the overdominant model. In general, cyclic environmental variation was found to be more effective at maintaining genetic variation than where the environment varies stochastically. The importance of temporal environmental variation and the maintenance of genetic variation is discussed.

Original languageEnglish (US)
Pages (from-to)757-770
Number of pages14
JournalGenetics
Volume78
Issue number2
StatePublished - Dec 1 1974

ASJC Scopus subject areas

  • Genetics

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