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Coevolution of self-fertilization and inbreeding depression. II. Symmetric overdominance in viability.

Publication ,  Journal Article
Uyenoyama, MK; Waller, DM
Published in: Theoretical population biology
August 1991

We describe the evolutionary dynamics of a modifier of selfing coevolving with a locus subject to symmetric overdominance in viability under general levels of reduction in pollination success as a consequence of self-fertilization (pollen discounting). Simple models of the evolution of breeding systems that represent inbreeding depression as a constant parameter do not admit the possibility of stable mixed mating systems involving both inbreeding and random mating. Contrary to this expectation, we find that coevolution between a modifier of selfing and a single overdominant locus situated anywhere in the genome can generate evolutionarily attracting mixed mating systems. Two forms of association between the modifier locus and the viability locus promote the evolution of outcrossing. The favored heterozygous genotype at the viability locus develops positive associations with modifier alleles that enhance outcrossing and with the heterozygous genotype at the modifier locus. Associations between outcrossing and high viability evolve immediately upon the introduction of a rare modifier allele, even in the absence of linkage.

Duke Scholars

Published In

Theoretical population biology

DOI

EISSN

1096-0325

ISSN

0040-5809

Publication Date

August 1991

Volume

40

Issue

1

Start / End Page

47 / 77

Related Subject Headings

  • Plants
  • Mutation
  • Models, Genetic
  • Inbreeding
  • Genetic Carrier Screening
  • Genes, Dominant
  • Fertilization
  • Evolutionary Biology
  • Chromosome Mapping
  • Biological Evolution
 

Citation

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Uyenoyama, M. K., & Waller, D. M. (1991). Coevolution of self-fertilization and inbreeding depression. II. Symmetric overdominance in viability. Theoretical Population Biology, 40(1), 47–77. https://doi.org/10.1016/0040-5809(91)90046-i
Uyenoyama, M. K., and D. M. Waller. “Coevolution of self-fertilization and inbreeding depression. II. Symmetric overdominance in viability.Theoretical Population Biology 40, no. 1 (August 1991): 47–77. https://doi.org/10.1016/0040-5809(91)90046-i.
Uyenoyama MK, Waller DM. Coevolution of self-fertilization and inbreeding depression. II. Symmetric overdominance in viability. Theoretical population biology. 1991 Aug;40(1):47–77.
Uyenoyama, M. K., and D. M. Waller. “Coevolution of self-fertilization and inbreeding depression. II. Symmetric overdominance in viability.Theoretical Population Biology, vol. 40, no. 1, Aug. 1991, pp. 47–77. Epmc, doi:10.1016/0040-5809(91)90046-i.
Uyenoyama MK, Waller DM. Coevolution of self-fertilization and inbreeding depression. II. Symmetric overdominance in viability. Theoretical population biology. 1991 Aug;40(1):47–77.
Journal cover image

Published In

Theoretical population biology

DOI

EISSN

1096-0325

ISSN

0040-5809

Publication Date

August 1991

Volume

40

Issue

1

Start / End Page

47 / 77

Related Subject Headings

  • Plants
  • Mutation
  • Models, Genetic
  • Inbreeding
  • Genetic Carrier Screening
  • Genes, Dominant
  • Fertilization
  • Evolutionary Biology
  • Chromosome Mapping
  • Biological Evolution