Genetica

, Volume 116, Issue 2, pp 179–188

The Evolution of Hybrid Infertility: Perpetual Coevolution between Gender-Specific and Sexually Antagonistic Genes

Authors

  • William R. Rice
    • Department of Ecology, Evolution and Marine BiologyUniversity of California
  • Adam K. Chippindale
    • Department of BiologyQueen's University
Article

DOI: 10.1023/A:1021205130926

Cite this article as:
Rice, W.R. & Chippindale, A.K. Genetica (2002) 116: 179. doi:10.1023/A:1021205130926

Abstract

A new hypothesis is proposed for the rapid evolution of postzygotic reproductive isolation via hybrid infertility. The hypothesis is motivated by two lines of experimental research from Drosophila melanogaster that demonstrate that sexually antagonistic fitness variation is abundant and that epistatic fitness variation on the Y chromosome is common. The hypothesis states that the expression of sexually antagonistic genes leads to a ‘gender-load’ in each sex. In response, gender-limited reproductive genes are selected to ameliorate, through pleiotropy, the expression of sexually antagonistic genes. Chronic coevolution between gender-limited genes and gender-unlimited sexually antagonistic genes causes rapid divergence of reproductive proteins among allopatric populations, ultimately leading to hybrid infertility.

genomic conflict hybrid infertility sex-specific genes sexual antagonism speciation

Copyright information

© Kluwer Academic Publishers 2002