| Molecular phylogeny and biogeography of Astilbe (Saxifragaceae) in Asia and eastern North America | |
Zhu, Wei-Dong1,2; Nie, Ze-Long1; Wen, Jun3; Sun, Hang1
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| 通讯作者 | Wen, J (reprint author), Smithsonian Inst, Dept Bot, Natl Museum Nat Hist, MRC 166, Washington, DC 20013 USA.，wenj@si.edu ; hsun@mail.kib.ac.cn |
| 2013-02-01 | |
| 发表期刊 | BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
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| ISSN | 0024-4074 |
| 卷号 | 171期号:2页码:377-394 |
| 摘要 | Phylogenetic analyses were conducted for Astilbe (Saxifragaceae), an Asian/eastern North American disjunct genus, using sequences of nuclear ribosomal internal transcribed spacer (ITS) and plastid matK, trnL-trnF and psbA-trnH regions. The monophyly of Astilbe is well supported by both ITS and plastid sequences. Topological incongruence was detected between the plastid and the ITS trees, particularly concerning the placement of the single North American species, A. biternata, which may be most probably explained by its origin involving hybridization and/or allopolyploidy with plastid capture. In Astilbe, all species with hermaphroditic flowers constitute a well-supported clade; dioecious species form a basal grade to the hermaphroditic clade. Astilbe was estimated to have split with Saxifragopsis from western North America at 20.69 Ma (95% HPD: 12.1430.22 Ma) in the early Miocene. This intercontinental disjunction between Astilbe and Saxifragopsis most likely occurred via the Bering land bridge. The major clade of Astilbe (all species of the genus excluding A. platyphylla) was inferred to have a continental Asian origin. At least three subsequent migrations or dispersals were hypothesized to explain the expansion of Astilbe into North America, Japan and tropical Asian islands. The intercontinental disjunct lineage in Astilbe invokes a hybridization event either in eastern Asia or in North America. This disjunction in Astilbe may be explained by a Beringian migration around 3.54 Ma (95% high posterior density: 1.296.18 Ma) in the late Tertiary, although long-distance dispersal from eastern Asia to North America is also likely. The biogeographical connection between continental Asia, Taiwan, the Philippines and other tropical Asian islands in Astilbe provides evidence for the close floristic affinity between temperate or alpine south-western China and tropical Asia. (C) 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2013, 171, 377-394. |
| 关键词 | Beringian Migration Intercontinental Disjunction South-western China Tropical Asia |
| 学科领域 | Plant Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313784100005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.kib.ac.cn/handle/151853/16260 |
| 专题 | 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.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650201, Yunnan, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Smithsonian Inst, Dept Bot, Natl Museum Nat Hist, Washington, DC 20013 USA |
| 推荐引用方式 GB/T 7714 | Zhu, Wei-Dong,Nie, Ze-Long,Wen, Jun,et al. Molecular phylogeny and biogeography of Astilbe (Saxifragaceae) in Asia and eastern North America[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2013,171(2):377-394. |
| APA | Zhu, Wei-Dong,Nie, Ze-Long,Wen, Jun,&Sun, Hang.(2013).Molecular phylogeny and biogeography of Astilbe (Saxifragaceae) in Asia and eastern North America.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,171(2),377-394. |
| MLA | Zhu, Wei-Dong,et al."Molecular phylogeny and biogeography of Astilbe (Saxifragaceae) in Asia and eastern North America".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 171.2(2013):377-394. |
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