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题名: Molecular phylogenetics and biogeography of the eastern Asian-eastern North American disjunct Mitchella and its close relative Damnacanthus (Rubiaceae, Mitchelleae)
作者: Huang, Wei-Ping1, 2; Sun Hang(孙航)1; Deng, Tao1; Razafimandimbison, Sylvain G.4, 5; Nie, Ze-Long1; Wen, Jun3
刊名: BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
关键词: Bering land bridge ; intercontinental disjunction
英文摘要: Mitchella is a small genus of the Rubiaceae with only two species. It is the only herbaceous semishrub of the family showing a disjunct distribution in eastern Asia and eastern North America, extending to Central America. Its phylogeny and biogeographical diversification remain poorly understood. In this study, we conducted phylogenetic and biogeographical analyses for Mitchella and its close relative Damnacanthus based on sequences of the nuclear internal transcribed spacer (ITS) and four plastid markers (rbcL, atpB-rbcL, rps16 and trnL-F). Mitchella is monophyletic, consisting of an eastern Asian M. undulata clade and a New World M. repens clade. Our results also support Michella as the closest relative to the eastern Asian Damnacanthus. The divergence time between the two intercontinental disjunct Mitchella species was dated to 7.73 Mya, with a 95% highest posterior density (HPD) of 3.14-12.53 Mya, using the Bayesian relaxed clock estimation. Ancestral area reconstructions suggest that the genus originated in eastern Asia. The semishrub Mitchella appears to have arisen from its woody ancestor in eastern Asia and then migrated to North America via the Bering land bridge in the late Miocene. (C) 2013 The Linnean Society of London Botanical Journal of the Linnean Society, 2013, 171, 395-412.
出版日期: 2013-02-01
卷号: 171, 期号:2, 页码:395-412
DOI标识: 10.1111/j.1095-8339.2012.01321.x
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0024-4074
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/16266
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, Washington, DC 20013 USA
4.Stockholm Univ, Royal Swedish Acad Sci, Bergius Fdn, SE-10691 Stockholm, Sweden
5.Stockholm Univ, Dept Bot, SE-10691 Stockholm, Sweden

Recommended Citation:
Huang, Wei-Ping; Sun, Hang; Deng, Tao; Razafimandimbison, Sylvain G.; Nie, Ze-Long; Wen, Jun.Molecular phylogenetics and biogeography of the eastern Asian-eastern North American disjunct Mitchella and its close relative Damnacanthus (Rubiaceae, Mitchelleae),BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2013,171(2):395-412
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