Molecular phylogeny of the Drosophila obscura species group,with emphasis on the Old World species |
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| Authors: | Jian-jun Gao Hide-aki Watabe Tadashi Aotsuka Jun-feng Pang Ya-ping Zhang |
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| Affiliation: | (1) Laboratory for Conservation and Utilization of Bio-resources, Yunnan University, Kunming, Yunnan, China;(2) State Key Laboratory of Genetic Resource and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China;(3) Biological Laboratory, Sapporo College, Hokkaido University of Education, Sapporo, Japan;(4) Department of Biology, Tokyo Metropolitan University, Japan |
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| Abstract: | Background Species of the Drosophila obscura species group (e.g., D. pseudoobscura, D. subobscura) have served as favorable models in evolutionary studies since the 1930's. Despite numbers of studies conducted with varied types of data, the basal phylogeny in this group is still controversial, presumably owing to not only the hypothetical 'rapid radiation' history of this group, but also limited taxon sampling from the Old World (esp. the Oriental and Afrotropical regions). Here we reconstruct the phylogeny of this group by using sequence data from 6 loci of 21 species (including 16 Old World ones) covering all the 6 subgroups of this group, estimate the divergence times among lineages, and statistically test the 'rapid radiation' hypothesis. |
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