Rapid Diversification Of Sperm Precedence Traits And Processes Among Three Sibling Drosophila Species

Mollie K. Manier, John M. Belote, Kirstin S. Berben, Stefan Lüpold, Outi Ala-Honkola, William F. Collins, Scott Pitnick

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Postcopulatory sexual selection is credited with driving rapid evolutionary diversification of reproductive traits and the formation of reproductive isolating barriers between species. This judgment, however, has largely been inferred rather than demonstrated due to general lack of knowledge about processes and traits underlying variation in competitive fertilization success. Here, we resolved processes determining sperm fate in twice-mated females, using transgenic Drosophila simulans and Drosophila mauritiana populations with fluorescently labeled sperm heads. Comparisons among these two species and Drosophila melanogaster revealed a shared motif in the mechanisms of sperm precedence, with postcopulatory sexual selection potentially occurring during any of the three discrete stages: (1) insemination; (2) sperm storage; and (3) sperm use for fertilization, and involving four distinct phenomena: (1) sperm transfer; (2) sperm displacement; (3) sperm ejection; and (4) sperm selection for fertilizations. Yet, underlying the qualitative similarities were significant quantitative differences in nearly every relevant character and process. We evaluate these species differences in light of concurrent investigations of within-population variation in competitive fertilization success and postmating/prezygotic reproductive isolation in hybrid matings between species to forge an understanding of the relationship between microevolutionary processes and macroevolutionary patterns as pertains to postcopulatory sexual selection in this group.

Original languageEnglish (US)
Pages (from-to)2348-2362
Number of pages15
JournalEvolution
Volume67
Issue number8
DOIs
StatePublished - Aug 2013

Keywords

  • Cryptic female choice
  • Fertilization
  • Postcopulatory sexual selection
  • Reproductive isolation
  • Sperm competition
  • Sperm storage

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Agricultural and Biological Sciences(all)

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    Manier, M. K., Belote, J. M., Berben, K. S., Lüpold, S., Ala-Honkola, O., Collins, W. F., & Pitnick, S. (2013). Rapid Diversification Of Sperm Precedence Traits And Processes Among Three Sibling Drosophila Species. Evolution, 67(8), 2348-2362. https://doi.org/10.1111/evo.12117