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Evolution

Title:		Reproductive character displacement of female mate preferences for male cuticular hydrocarbons in Drosophila subquinaria
Author(s):		Rundle HD; Dyer KA;
Address:		"Department of Biology, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada. hrundle@uottawa.ca. Department of Genetics, University of Georgia, Athens, Georgia, 30602"
Journal Title:		Evolution
Year:		2015
Volume:		20150916
Issue:		10
Page Number:		2625 - 2637
DOI:		10.1111/evo.12761
ISSN/ISBN:		1558-5646 (Electronic) 0014-3820 (Linking)
Abstract:		"Several lines of evidence implicate sexual isolation in both initiating and completing the speciation process. Although its existence is straightforward to demonstrate, understanding the evolution of sexual isolation requires identifying the underlying phenotypes responsible so that we can determine how these have diverged. Here, we study geographic variation in female mate preferences for male sexual displays in the fly Drosophila subquinaria. Female D. subquinaria that are sympatric with its sister species D. recens discriminate strongly against both D. recens and allopatric conspecific males, whereas females from allopatric populations do not. Furthermore, female mate preferences target at least in part a suite of cuticular hydrocarbons (CHCs) in males and geographic variation in CHCs mirrors the pattern of mate discrimination. In this study, we quantify female mate preferences for male CHCs from populations that span the geographic range of D. subquinaria. We find that the direction of linear sexual selection varies significantly between populations that are sympatric versus allopatric with D. recens in a pattern of reproductive character displacement. Differences in preference partially align with existing differences in CHCs and patterns of sexual isolation, although discrepancies remain that suggest the involvement of additional traits and/or more complex, nonlinear preference functions"
Keywords:		"Animals Drosophila/*genetics/physiology Female Genetic Speciation Male *Mating Preference, Animal Phenotype Pheromones/chemistry Sympatry Behavioral isolation Drosophila recens reinforcement sexual isolation sexual selection speciation;"
Notes:		"MedlineRundle, Howard D Dyer, Kelly A eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2015/08/25 Evolution. 2015 Oct; 69(10):2625-37. doi: 10.1111/evo.12761. Epub 2015 Sep 16"