Maximum polyphyly: Multiple origins and delimitation with plesiomorphic characters require a new circumscription of Minuartia (Caryophyllaceae)
Maximum polyphyly: Multiple origins and delimitation with plesiomorphic characters require a new circumscription of Minuartia (Caryophyllaceae)
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DOI：
10.12705/631.5
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发表时间：
2014-02-01
期刊：
影响因子：
3.4
通讯作者：
Kadereit, Joachim W.
中科院分区：
文献类型：
--
作者：
Dillenberger, Markus S.;Kadereit, Joachim W.
Minuartia属是石竹科中较大的属之一，约有175种，主要分布于北方半球。该属的分类学已被几位作者研究，导致许多亚属群的识别。以前的石竹科植物分类表明，Minuartia是多系的，但只包括有限的样品。我们在这里提供了一个分子系统发育Minuartia包括所有亚属组承认在属的最后修订。利用nrITS和质体matK的DNA序列，对160个内群和105个外群样品的系统发育进行了重建。重建了Minuartia（三种风格加上三个胶囊阀/牙齿）的划界相关的形态特征的演变。Minuartia被定义为具有近形特征，并且是高度多系的。所有四个亚属属于不同的谱系包含其他属的家庭，和M subg。Minuartia，作为迄今为止最大的亚属，福尔斯分为七个分支，它们一起不形成一个单门。这些分支与其他几个属密切相关，例如，漆姑草、白花和硬花。在某些情况下，亚属以下的分类群是单系的。Minuartia的模式为M dichotoma，是包含M sect. Plurinerebrae和Sect. Minuartia的一个分支的一部分。我们建议保留这支作为Minuartia s.str.，并将Minuartia的其他物种转移到Cherleria，Eremogone，Facchinia，Mcneillia，Minuartiella，Mononeuria，Pseudocherleria，Rhodalsine，Sabulina和Triplateia属。
Minuartia is one of the larger genera of Caryophyllaceae with about 175 species distributed mainly in the Northern Hemisphere. The taxonomy of the genus has been studied by several authors, resulting in the recognition of numerous infrageneric groups. Previous phylogenies of the Caryophyllaceae showed that Minuartia is polyphyletic, but included only a limited sample of the genus. We here provide a molecular phylogeny of Minuartia including all infrageneric groups recognized in the last revision of the genus. We reconstructed the phylogeny of the genus using DNA sequences of nrITS and plastid matK from 160 ingroup and 105 outgroup samples. The evolution of the morphological character relevant for the delimitation of Minuartia (three styles plus three capsule valves/teeth) was reconstructed. Minuartia has been defined with a plesiomorphic character and is highly polyphyletic. All four subgenera fall into different lineages containing other genera of the family, and M subg. Minuartia, as by far the largest subgenus, falls into seven clades, which together do not form a monophylum. These clades are closely related to several other genera, e.g., Sagina, Colobanthus and Scleranthus. In several cases taxonomic groups below subgeneric rank are monophyletic. The type of Minuartia, M dichotoma, is part of a clade containing M sect. Plurinerviae and sect. Minuartia. We propose to retain this clade as Minuartia s.str. and to transfer the other species of Minuartia to the genera Cherleria, Eremogone, Facchinia, Mcneillia, Minuartiella, Mononeuria, Pseudocherleria, Rhodalsine, Sabulina and Triplateia.