Molecular phylogeny of the Drosophila obscura species group, with emphasis on the Old World species

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	Molecular phylogeny of the Drosophila obscura species group, with emphasis on the Old World species
	Gao JJ 1,2; Watabe HA 3; Aotsuka T 4; Pang JF 2; Zhang YP[*]1,2
刊名	BMC EVOLUTIONARY BIOLOGY
	2007
卷号	7 期号:X 页码:e87
通讯作者	zhangyp1@263.net.cn
合作状况	其它
英文摘要	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. Results: Phylogenetic analyses indicate that each of the subobscura, sinobscura, affinis, and pseudoobscura subgroups is monophyletic. The subobscura and microlabis subgroups form the basal clade in the obscura group. Partial species of the obscura subgroup (the D. ambigua/ D. obscura/D. tristis triad plus the D. subsilvestris/D. dianensis pair) forms a monophyletic group which appears to be most closely related to the sinobscura subgroup. The remaining basal relationships in the obscura group are not resolved by the present study. Divergence times on a ML tree based on mtDNA data are estimated with a calibration of 30 - 35 Mya for the divergence between the obscura and melanogaster groups. The result suggests that at least half of the current major lineages of the obscura group originated by the mid- Miocene time (similar to 15 Mya), a time of the last developing and fragmentation of the temperate forest in North Hemisphere. Conclusion: The obscura group began to diversify rapidly before invading into the New World. The subobscura and microlabis subgroups form the basal clade in this group. The obscura subgroup is paraphyletic. Partial members of this subgroup (D. ambigua, D. obscura, D. tristis, D. subsilvestris, and D. dianensis) form a monophyletic group which appears to be most closely related to the sinobscura subgroup.
收录类别	SCI
资助信息	The present study was supported by grants of the State Key Basic Research and Development Plan, NSFC (30460026, 30621092), Bureau of Science and Technology of Yunnan Province, and JSPS (No. 12375002, 16370040, 19570077).
语种	英语
内容类型	期刊论文
源URL	[http://159.226.149.26:8080/handle/152453/10531]
专题	昆明动物研究所_分子进化基因组学昆明动物研究所_遗传资源与进化国家重点实验室
作者单位	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
推荐引用方式 GB/T 7714	Gao JJ,Watabe HA,Aotsuka T,et al. Molecular phylogeny of the Drosophila obscura species group, with emphasis on the Old World species[J]. BMC EVOLUTIONARY BIOLOGY,2007,7(X):e87.
APA	Gao JJ,Watabe HA,Aotsuka T,Pang JF,&Zhang YP[*].(2007).Molecular phylogeny of the Drosophila obscura species group, with emphasis on the Old World species.BMC EVOLUTIONARY BIOLOGY,7(X),e87.
MLA	Gao JJ,et al."Molecular phylogeny of the Drosophila obscura species group, with emphasis on the Old World species".BMC EVOLUTIONARY BIOLOGY 7.X(2007):e87.