title: Evolution of cuticular hydrocarbons of Hawaiian Drosophilidae.
abstract: Hawaiian Drosophila offer an excellent model for adaptive evolution. More than 500 species are reported in Hawaiian islands, and there is considerable diversity in behavior and morphology. Such diversity is mainly driven by sexual selection. In this study qualitative and quantitative chemical compositions of cuticular hydrocarbons (CHCs) in 138 flies belonging to 27 Hawaiian Drosophila species, picture-winged and non picture-winged, were analyzed regarding sexual dimorphism, differences in saturation, branching position, and lengths of CHCs. We found significant variation in the CHC patterns. In several subgroups, new species show decreases in unsaturated hydrocarbons, and gradual increases in branched compounds, monomethylalkanes and dimethylalkanes, not commonly found in Drosophila. Moreover, branching positions gradually shifted towards internal carbons, and chain lengths increased in the new species. The long-term evolution of CHCs in the light of the recent evolutionary migration and adaptation history of Hawaiian Drosophila species along the developing archipelago was discussed.
authors.affiliation: Faculte des Sciences d'Orsay, CNPS, UMR UPS-CNRS, Université Paris-SUD, 91405 Orsay Cédex, France.
authors.forename: Helena
authors.initials: H
authors.lastname: Alves
authors.forename: Jacques-Deric
authors.initials: JD
authors.lastname: Rouault
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kondoh
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Nakano
authors.forename: Daisuke
authors.initials: D
authors.lastname: Yamamoto
authors.forename: Yong-Kyu
authors.initials: YK
authors.lastname: Kim
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Jallon
mesh_terms: D000473:Alkanes / Q000032:analysis* / Q000737:chemistry* / Q000378:metabolism; D000818:Animals; D005075:Biological Evolution; D004330:Drosophila; D005260:Female; D006254:Hawaii; D006838:Hydrocarbons / Q000032:analysis* / Q000737:chemistry* / Q000378:metabolism; D034582:Integumentary System; D008297:Male; D052586:Mating Preference, Animal / Q000502:physiology; D058974:Phylogeography; D013045:Species Specificity; D014921:Wings, Animal
chemical_list: D000473:Alkanes; D006838:Hydrocarbons