On the evolutionary costs of self-incompatibility: incomplete reproductive compensation due to pollen limitation.

Published

Journal Article

Pollen limitation affects plants with diverse reproductive systems and ecologies. In self-incompatible (SI) species, pollen limitation may preclude full reproductive compensation for prezygotic rejection of pollen. We present a model designed to explore the effects of incomplete reproductive compensation on evolutionary changes at a modifier locus that regulates the level of SI expression. Our results indicate that incomplete reproductive compensation greatly increases the evolutionary costs of SI, particularly in populations with low S-allele diversity. The evolutionary fate of modifiers of SI expression depends on the rate at which they are transmitted to future generations as well as the effects of SI on offspring number and quality. Partial SI expression can represent a stable condition rather than an evolutionarily transient state between full expression and full suppression. This unanticipated result provides the first theoretical support for the evolutionary stability of such mixed mating systems, the existence of which has recently been documented.

Full Text

Duke Authors

Cited Authors

  • Vallejo-Marín, M; Uyenoyama, MK

Published Date

  • September 2004

Published In

Volume / Issue

  • 58 / 9

Start / End Page

  • 1924 - 1935

PubMed ID

  • 15521452

Pubmed Central ID

  • 15521452

Electronic International Standard Serial Number (EISSN)

  • 1558-5646

International Standard Serial Number (ISSN)

  • 0014-3820

Digital Object Identifier (DOI)

  • 10.1111/j.0014-3820.2004.tb00480.x

Language

  • eng