Journal
FLY
Volume 1, Issue 1, Pages 33-37Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/fly.3840
Keywords
sperm; sperm storage; female reproductive tract; speciation; reproductive isolation; geographically isolated subpopulations
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The process of speciation requires the development of isolating mechanisms that act as barriers to gene flow between incipient species. Such mechanisms can occur at three different levels: precopulatory or behavioral isolation, postcopulatory-prezygotic isolation occurring in the female reproductive tract, or postzygotic isolation resulting in hybrid sterility or inviability. Only by extensively studying all three types of barriers in young species pairs can we begin to understand the evolution of early reproductive incompatibilities, which may be important to the speciation process. Although precopulatory and postzygotic isolation have been well described it is only recently that the female reproductive tract has been intensely examined for possible mechanisms of reproductive isolation (reviewed in refs 1 and 2). The types of isolating mechanisms that develop at this level and their role in speciation, therefore, remain poorly understood.
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