Generic phylogeny and historical biogeography of Alismataceae, inferred from multiple DNA sequences
Generic phylogeny and historical biogeography of Alismataceae, inferred from multiple DNA sequences
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从多个 DNA 序列推断泽泻科的一般系统发育和历史生物地理学
DOI：
10.1016/j.ympev.2012.01.016
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发表时间：
2012-05-01
影响因子：
4.1
通讯作者：
Wang, Qing-Feng
中科院分区：
文献类型：
--
作者：
Chen, Ling-Yun;Chen, Jin-Ming;Wang, Qing-Feng
泽泻科是一个水生或半水生的草本植物科，具有亚世界性的分布。该科是单子叶植物中最古老的谱系之一，在有花植物的系统学、植物地理学和进化过程中起着重要作用。然而，家庭的属关系仍然是一个有争议的话题，其历史年表研究较少。本研究基于多个DNA序列（核：ITS;叶绿体：psbA、rbcL、matK、rpoB、rpoC 1、trnK 5'内含子和trnK 3'内含子;线粒体：cob和atp 1）进行了系统发育分析。结果支持将泽漆科并入泽泻科。基于ITS、psbA、rbcL和matK数据集的组合，获得了两个支持良好的分支。分支B由Luronium、Damasonium、Baldellia和Alisma组成;分支A由Alismataceae和Limnocharitaceae的其余属组成。生物地理分析和贝叶斯分子年代学研究表明，泽泻科植物在晚白垩世起源于西部古北区或非洲热带地区，随后分裂为两个分支。进化枝A和进化枝B分别在非洲热带区和西部古北区发生分化。该科的洲际分布主要是由跨越陆桥迁移和远距离扩散造成的。(C)2012 Elsevier Inc. All rights reserved.
Alismataceae is an aquatic or semi-aquatic herb family with a subcosmopolitan distribution. The family is one of the oldest lineages within monocots and plays an important role in the systematics, biogeography and evolutionary processes of flowering plants. However, the generic relationships of the family are still a subject of debate, and its historical biogeography is less studied. In the present study, we carried out a comprehensive phylogenetic analysis based on multiple DNA sequences (nuclear: ITS; chloroplast: psbA, rbcL, matK, rpoB, rpoC1, trnK 5' intron and trnK 3' intron; mitochondria: cob and atp1). The result supports merging Limnocharitaceae into Alismataceae as one family. Two well-supported clades were obtained based on the combined ITS, psbA, rbcL and matK dataset. Clade B consists of Luronium, Damasonium, Baldellia and Alisma: and clade A consists of the remaining genera of Alismataceae as well as Limnocharitaceae. Biogeographic analysis and Bayesian molecular dating suggested that Alismataceae originated in West Palearctic or Afrotropical area during the Late Cretaceous, and subsequently split into two clades. Clade A and clade B diversified in Afrotropical area and West Palearctic area, respectively. The intercontinental distribution of this family mainly resulted from dispersals involving migration across land bridges and long-distance dispersal. (C) 2012 Elsevier Inc. All rights reserved.