Polymorphism from environmental heterogeneity: models are only robust if the heterozygote is close in fitness to the favoured homozygote in each environment

Genetical Research - Tập 45 Số 3 - Trang 299-314 - 1985
Rolf F. Hoekstra1, R. Bijlsma2, A. J. Dolman1
1Department of Genetics, University of Groningen, Centre of Biological Sciences, 9751 NN Haren, The Netherlands
2Weissing group

Tóm tắt

SummaryThe lack of robustness of models of the maintenance of polymorphism in a heterogeneous environment which has been pointed out by Maynard Smith & Hoekstra (1980), applies also to models based on habitat selection, on temporal variation and on density-regulated selection. Only if (partial) dominance ‘switches’ between environments such that the fitness of the heterozygote is always close to the favoured homozygote, is there reasonable robustness. This is true for all models considered. It is argued that there are good reasons for supposing that the favourable allele at a locus may show dominance, although the experimental evidence is still scanty.

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Genetical Research

Tập 45 Số 3

299-314

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