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首页> 外文期刊>Cladistics: The international journal of the Willi Hennig Society >Molecular phylogenetics of tribe Synandreae, a North American lineage of lamioid mints (Lamiaceae)
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Molecular phylogenetics of tribe Synandreae, a North American lineage of lamioid mints (Lamiaceae)

机译：北美拟南芥薄荷谱系Synandreae部落的分子系统发育

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摘要

The five mint genera Brazoria, Macbridea, Physostegia, Synandra and Warnockia (Lamioideae: Lamiaceae) are all North American endemics. Together with the monotypic European genus Melittis and the Asian genus Chelonopsis, these taxa have been classified as subtribe Melittidinae. Previous morphological studies have failed to uncover synapomorphic characters for this group. We sequenced the plastid trnL-trnF region and trnS-trnG spacer and the nuclear ribosomal 5S non-transcribed spacer (5S-NTS) to assess phylogenetic relationships within Melittidinae. Standard parsimony and direct optimization (POY) analyses show Melittis, the type genus of the subtribe, as sister to Stachys. Thus, the monophyly of subtribe Melittidinae is not supported either by molecular or morphological data. However, the North American endemics form a monophyletic group that can be recognized as the recircumscribed tribe Synandreae. The molecular relationships among these genera are corroborated by both morphological and cytological data. The expected close relationship between the south-central endemics Warnockia and Brazoria and their sister relationship to the widespread genus Physostegia is confirmed. Nevertheless, most of the North American endemics are restricted to the south-east of the continent. Dispersal westwards and northwards is correlated with an increase in chromosome numbers. No specific Eurasian origin (i.e., transatlantic or transpacific) can be determined, but Synandreae are clearly distinct from the large Stachys clade, and therefore represent a separate migration into North America. (C) The Willi Hennig Society 2007.
机译：五个芸苔属属的Brazoria，Macbridea，Physostegia，Synandra和Warnockia（Lamioideae：Lamiaceae）都是北美特有的。连同欧洲单性的Melittis属和亚洲的Chelonopsis属一起，这些分类群被分类为Melittidinae部落。先前的形态学研究未能发现该组的亚同型特征。我们对质体trnL-trnF区域和trnS-trnG间隔子和核糖体5S非转录间隔子（5S-NTS）进行了测序，以评估Mel蝶科内的系统发育关系。标准的简约和直接优化（POY）分析显示，Melittis（子部落的类型属）是Stachys的姐妹。因此，分子或形态学数据均不支持蜂id亚科的单系。但是，北美特有种形成了一个单族群，可以被认为是重新划定的Syandreae部落。这些属之间的分子关系被形态学和细胞学数据所证实。证实了中南部地方病Warnockia和Brazoria之间的预期密切关系，以及它们与广泛的Physostegia属的姐妹关系。尽管如此，大多数北美地方病都局限于该大陆的东南部。向西和向北扩散与染色体数目的增加有关。无法确定具体的欧亚起源（即跨大西洋或跨太平洋），但Synandreae明显不同于大型Stachys进化枝，因此代表了向北美的单独迁徙。 （C）威利·亨尼格学会2007年。

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