Molecular phylogenetics and evolutionary history of sect. Quinquefoliae (Pinus): Implications for Northern Hemisphere biogeography
Molecular phylogenetics and evolutionary history of sect. Quinquefoliae (Pinus): Implications for Northern Hemisphere biogeography
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分子系统发育学和教派进化史。
DOI：
10.1016/j.ympev.2015.03.013
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发表时间：
2015-06-01
影响因子：
4.1
通讯作者：
Wang, Xiao-Quan
中科院分区：
文献类型：
--
作者：
Hao, Zhen-Zhen;Liu, Yan-Yan;Wang, Xiao-Quan
新生代的气候变化和构造事件极大地影响了温带植物区系的演化和地理分布。这种后果在古老、分布广泛且多样化的植物群中最为明显。作为分布最广泛的树属之一，松树为研究北半球物种多样化和生物地理分离的历史提供了一个很好的模型。在这项研究中，我们重建了该教派的系统发育并研究了该教派的进化和生物地理学历史。五叶松 (Pinus) 是一个物种丰富的谱系，基于完整的分类单元采样并使用来自叶绿体 (cp)、线粒体 (mt) 和核基因组的 9 个 DNA 片段，断续分布在亚洲、欧洲和北美。 cpDNA 和核基因系统发育充分支持了 Krempfianae、Gerardianae 和 Strobus 这三个亚科的单系性。然而，两者都不是。 Gerardianae 也不亚组。 Strobus 在 mtDNA 系统发育中形成一个单系群，其中的教派。 Quinquefoliae 分为两个主要分支，一个由北美和东北亚物种以及欧洲 P. peuce 亚组组成。 Strobus 和另一个包括属于三个亚科的剩余欧亚物种。基因树之间显着的拓扑不一致，结合分歧时间估计和祖先区域重建，表明在教派的进化过程中发生了古代和相对较新的渐渗杂交事件。五叶草，特别是在亚洲东北部和北美西北部。此外，系统发育分析表明该物种属于亚科。尽管非单系物种在核基因树中非常普遍，但来自亚热带东亚和邻近地区的Strobus可能具有单一起源。此外，我们的研究似乎支持该教派起源于特提斯。给出了五叶草亚科的分布和系统发育位置。 Krempfianae 和 Gerardianae，还强调了新近纪晚期活跃的山地建筑和气候变化对塑造松属物种多样性和地理分布的重要性。 (C) 2015 Elsevier Inc. 保留所有权利。
Climatic changes and tectonic events in the Cenozoic have greatly influenced the evolution and geographic distribution of the temperate flora. Such consequences should be most evident in plant groups that are ancient, widespread, and diverse. As one of the most widespread genera of trees, Pinus provides a good model for investigating the history of species diversification and biogeographic disjunction in the Northern Hemisphere. In this study, we reconstructed the phylogeny and investigated the evolutionary and biogeographic history of sect. Quinquefoliae (Pinus), a species-rich lineage disjunctly distributed in Asia, Europe and North America, based on complete taxon sampling and by using nine DNA fragments from chloroplast (cp), mitochondrial (mt) and nuclear genomes. The monophyly of the three subsections, Krempfianae, Gerardianae, and Strobus, is well-supported by cpDNA and nuclear gene phylogenies. However, neither subsect. Gerardianae nor subsect. Strobus forms a monophyletic group in the mtDNA phylogeny, in which sect. Quinquefoliae was divided into two major clades, one consisting of the North American and northeastern Asian species as well as the European P. peuce of subsect. Strobus, and the other comprising the remaining Eurasian species belonging to three subsections. The significant topological incongruence among the gene trees, in conjunction with divergence time estimation and ancestral area reconstruction, indicates that both ancient and relatively recent introgressive hybridization events occurred in the evolution of sect. Quinquefoliae, particularly in northeastern Asia and northwestern North America. In addition, the phylogenetic analysis suggests that the species of subsect. Strobus from subtropical eastern Asia and neighboring areas may have a single origin, although species non-monophyly is very widespread in the nuclear gene trees. Moreover, our study seems to support a Tethyan origin of sect. Quinquefoliae given the distributions and phylogenetic positions of subsects. Krempfianae and Gerardianae, and also highlights the importance of active mountain buildings and climatic changes during the Late Neogene in shaping the species diversity and geographic distribution of Pinus. (C) 2015 Elsevier Inc. All rights reserved.