Evolution of cuticular hydrocarbons of Hawaiian Drosophilidae.
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.
Alves
Helena
H
Faculte des Sciences d'Orsay, CNPS, UMR UPS-CNRS, Université Paris-SUD, 91405 Orsay Cédex, France.
Rouault
Jacques-Deric
JD
Kondoh
Yasuhiro
Y
Nakano
Yoshiro
Y
Yamamoto
Daisuke
D
Kim
Yong-Kyu
YK
Jallon
Jean-Marc
JM
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
D000473:Alkanes; D006838:Hydrocarbons