Can patterns of chromosome inversions in Drosophila pseudoobscura predict polyandry across a geographical cline?

Paul Herrera, Michelle L. Taylor, Alison Skeats, Tom A.R. Price, Nina Wedell*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

5 Citations (Scopus)

Abstract

Female multiple mating, known as polyandry, is ubiquitous and occurs in a wide variety of taxa. Polyandry varies greatly from species in which females mate with one or two males in their lifetime to species in which females may mate with several different males on the same day. As multiple mating by females is associated with costs, numerous hypotheses attempt to explain this phenomenon. One hypothesis not extensively explored is the possibility that polyandrous behavior is captured and "fixed" in populations via genetic processes that preserve the behavior independently of any adaptive benefit of polyandry. Here, we use female isolines derived from populations of Drosophila pseudoobscura from three locations in North America to examine whether different female remating levels are associated with patterns of chromosome inversions, which may explain patterns of polyandry across the geographic range. Populations differed with respect to the frequency of polyandry and the presence of inversion polymorphisms on the third chromosome. The population with the lowest level of female remating was the only one that was entirely comprised of homokaryotypic lines, but the small number of populations prevented us investigating this relationship further at a population level. However, we found no strong relationship between female remating levels and specific karyotypes of the various isolines. Here we examine whether variation in female remating levels of Drosophila pseudoobscura from three locations in North America are associated with patterns of chromosome inversions, which may explain patterns of polyandry across the geographic range. Populations differed with respect to the frequency of polyandry and the presence of inversion polymorphisms on the third chromosome. However, we found no strong relationship between female remating levels and specific karyotypes between isolines.

Original languageEnglish
Pages (from-to)3072-3081
Number of pages10
JournalEcology and Evolution
Volume4
Issue number15
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Drosophila pseudoobscura
  • Chromosome inversion
  • Karyotype
  • Polyandry

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