A shift to shorter cuticular hydrocarbons accompanies sexual isolation among Drosophila americana group populations

Jeremy S Davis, Matthew Pearcy, Joanne Yew & Leonie Moyle
Because sensory signals often evolve rapidly, they could be instrumental in the emergence of reproductive isolation between species. However, pinpointing their specific contribution to isolating barriers, and the mechanisms underlying their divergence, remains challenging. Here we demonstrate sexual isolation due to divergence in chemical signals between two populations of Drosophila americana (SC and NE) and one population of D. novamexicana, and dissect its underlying phenotypic and genetic mechanisms. Mating trials revealed strong sexual isolation between...
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