Molecular phylogeny of Helleborus (Ranunculaceae), with an emphasis on the East Asian-Mediterranean disjunction | |
Sun, H![]() | |
刊名 | TAXON
![]() |
2001-11-01 | |
卷号 | 50期号:4页码:1001-1018 |
关键词 | biogeography Helleborus ITS matK molecular systematics trnL-F |
ISSN号 | 0040-0262 |
英文摘要 | Phylogenetic relationships within the genus Helleborus (Ranunculaceae) were evaluated with analyses of plastid trnL-F and partial matK and nuclear ITS DNA sequences for all 16 currently recognised species in addition to several subspecies and geographical variants. The molecular study provides strong support for the monophyly of Helleborus. However, both traditional divisions of the genus, into two groups (Caulescentes and Scapigeri) or two subgenera (Helleborastrum and Helleborus), are refuted. All six currently recognised sections (Dicarpon, Chenopus, Griphopus, Helleborus, Helleborastrum, and Syncarpus) are monophyletic, four by default because they are monospecific. Section Dicarpon (H. thibetanus) is strongly supported as sister group to section Helleborastrum and could therefore be sunk into that section. Relationships between this pair of sections and the other sections are, however, not clear. At the specific level, all species which are clearly distinct morphologically are also distinct in terms of molecular divergence, but relationships between the poorly differentiated species in section Helleborastrum are not resolved with any degree of support. Using a molecular clock based on matK sequence divergence, the disjunction of H. thibetanus and section Helleborastrum between East Asia and the Mediterranean is tentatively dated at approximately 23 million years (middle Miocene), which corresponds well with the geological history of the area where H. thibetanus occurs. |
学科主题 | Plant Sciences; Evolutionary Biology |
类目[WOS] | Plant Sciences ; Evolutionary Biology |
研究领域[WOS] | Plant Sciences ; Evolutionary Biology |
关键词[WOS] | NUCLEAR RIBOSOMAL DNA ; F SEQUENCE DATA ; CHLOROPLAST-DNA ; NORTH-AMERICAN ; PLASTID RBCL ; DATA SETS ; DIVERGENCE ; BIOGEOGRAPHY ; EVOLUTION ; MATK |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000173484600002 |
公开日期 | 2012-07-18 |
内容类型 | 期刊论文 |
源URL | [http://ir.kib.ac.cn/handle/151853/13943] ![]() |
专题 | 昆明植物研究所_中国科学院东亚植物多样性与生物地理学重点实验室 |
作者单位 | 1.Royal Bot Gardens, Richmond TW9 3DS, Surrey, England 2.Phedar Nursery, Stockport SK6 3DS, Lancs, England 3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, H,McLewin, W,Fay, MF. Molecular phylogeny of Helleborus (Ranunculaceae), with an emphasis on the East Asian-Mediterranean disjunction[J]. TAXON,2001,50(4):1001-1018. |
APA | Sun, H,McLewin, W,&Fay, MF.(2001).Molecular phylogeny of Helleborus (Ranunculaceae), with an emphasis on the East Asian-Mediterranean disjunction.TAXON,50(4),1001-1018. |
MLA | Sun, H,et al."Molecular phylogeny of Helleborus (Ranunculaceae), with an emphasis on the East Asian-Mediterranean disjunction".TAXON 50.4(2001):1001-1018. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论