Sperm competition and the dynamics of X chromosome drive in finite and structured populations

Jesse Taylor, John Jaenike

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Of the several deleterious consequences that sex chromosome meiotic drive can have for a population, extinction is the most severe. Several studies of this phenomenon have suggested that males carrying a driving X chromosome may be disadvantaged during sperm competition. Deterministic modeling indicates that sperm competition can maintain a balanced polymorphism of driving and non-driving X chromosomes, but that if the frequency of the driving chromosomes exceeds some threshold value, then these chromosomes will spread to fixation and the population will go extinct. In this article we present the results of individual-based simulations of a stochastic model of X chromosome drive in finite and structured populations. We show that in large populations the balanced polymorphism can be maintained for hundreds of thousands of generations, but that reductions in population size and certain forms of population structure promote fixation of the driving chromosome.

Original languageEnglish (US)
Pages (from-to)195-206
Number of pages12
JournalAnnales Zoologici Fennici
Volume40
Issue number2
StatePublished - Jun 11 2003

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ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Animal Science and Zoology
  • Nature and Landscape Conservation

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