Molecular phylogeny and biogeography of Astilbe (Saxifragaceae) in Asia and eastern North America
Zhu, Wei-Dong1,2; Nie, Ze-Long1; Wen, Jun3; Sun, Hang1
2013-02-01
发表期刊BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN0024-4074
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
资助信息Natural Science Foundation of China [40930209, U1136601, 31129001]; Hundred Talents Program of the Chinese Academy of Sciences [2011312D11022]; NSFC-International (Region) Cooperation Project [31061160184]; Innovation Project of Chinese Academy of Sciences [KSCX2-YW-Z-1019]; John D. and Catherine T. MacArthur Foundation
学科领域Plant Sciences
收录类别SCI
语种英语
WOS研究方向Plant Sciences
WOS类目Plant Sciences
WOS记录号WOS:000313784100005
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
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
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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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