Phylogeny and biogeography of Maianthemum (Asparagaceae: Nolinoideae) revisited with emphasis on its divergence pattern in SW China.
Phylogeny and biogeography of Maianthemum (Asparagaceae: Nolinoideae) revisited with emphasis on its divergence pattern in SW China.
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重温舞花（天门冬科：Nolinoideae）的系统发育和生物地理学，重点关注其在中国西南地区的分化模式
DOI：
10.1016/j.pld.2021.02.001
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发表时间：
2021-04
期刊：
影响因子：
4.8
通讯作者：
Nie ZL
中科院分区：
文献类型：
--
作者：
Meng R;Meng Y;Yang YP;Nie ZL
菊花属(Maianhemum)隶属于十字花科(芦笋科)黄精属，广泛分布于北美洲、中美洲和东亚，在东喜马拉雅山脉到中国西南部的横断山一带具有较高的多样性。尽管中国西南部的大多数种形成了一个支持良好的支系，但在这个支系内的系统发育关系仍然不清楚。通过广泛的分类单元采样和8个DNA区的广泛特征采样，本研究旨在重新探讨该属的系统发育和生物地理，以更好地了解西南中国的物种分化模式。系统发育结果表明，该属为单系，可识别出9个强支持的支系，但这些支系之间的主干关系仍很不确定。对于西南中国支系，来自同一物种的个体被归入不同的谱系。结果表明，西南中国支的快速辐射发生在喜马拉雅山脉东部，随后的辐射发生在上新世的横断山区。在晚中新世至上新世期间，北半球菊花的洲际分离似乎发生了多次，可能是替代事件和远距离扩散事件共同作用的结果。根据它们在新旧大陆的生物地理分布，在菊属中识别出9个谱系。东喜马拉雅地区发生了一次辐射，上新世横断山发生了向东的变化。北半球的分离似乎在中新世晚期到上新世期间发生了多次。
Maianthemum is a genus with more than 35 species from the tribe Polygonateae (Asparagaceae), widely distributed between North to Central Americas and eastern Asia with high diversity in the eastern Himalayas to the Hengduan Mountains of SW China. Although most species from SW China form a well-supported clade, phylogenetic relationships within this clade remain unclear. With a broad level of taxon sampling and an extensive character sampling from eight DNA regions, this study intends to revisit the phylogeny and biogeography of the genus to better understand the divergence patterns of species from SW China. Phylogenetic results suggested the monophyly of Maianthemum with recognition of nine strongly supported clades, but backbone relationships among these clades remained largely uncertain. For the SW China clade, individuals from the same species are grouped into different lineages. Our results revealed that the fast radiation of the SW China clade was occurred in the eastern Himalayas, followed by subsequent radiation in the Hengduan Mountains in the Pliocene. Intercontinental disjunctions of Maianthemum in the Northern Hemisphere appear to have occurred multiple times during the late Miocene to the Pliocene, likely resulted by a combination of both vicariance and long-distance dispersal events. Nine lineages are recognized in Maianthemum, corresponding to their biogeographic distribution in the Old and New World. A radiation was occurred in the eastern Himalayas, with eastward diversification in the Hengduan Mountains in the Pliocene. Disjunctions in the Northern Hemisphere appear to have occurred multiple times during the late Miocene to the Pliocene.
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影响因子：
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作者：
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通讯作者：
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