Morphology, phylogeny, and taxonomy of Microthlaspi (Brassicaceae: Coluteocarpeae) and related genera
Morphology, phylogeny, and taxonomy of Microthlaspi (Brassicaceae: Coluteocarpeae) and related genera
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DOI：
10.12705/651.6
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发表时间：
2016-03-08
期刊：
影响因子：
3.4
通讯作者：
Thines, Marco
中科院分区：
文献类型：
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作者：
Ali, Tahir;Schmuker, Angelika;Thines, Marco
自1753年林奈描述以来，该属已被各种细分，但由于果实形状的相似性，几个分离物仍然没有得到广泛的认可，尽管它们与Thlaspi没有直接关系。这尤其适用于现在被认为属于Coluteocarpeae族的分离，其中包括几个研究充分的分类群，例如，Nebroea caerulescens（syn. Thlaspi caerulescens）和广泛分布的Microthlaspi perfoliatum（syn. Thlaspi perfoliatum）。这个部落的分类仍然有争议，因为一系列关于Coluteocarpeae的详细专著没有用英语出版，并且在以前的研究中发现这个部落缺乏系统发育分辨率。目前的研究提出了详细的系统发育调查和形态特征的批判性审查，重点放在以前放置在Microthlaspi的类群。基于一个核（ITS）和两个叶绿体（matK、trnL-F）位点，在所包括的Coluteocarpeae属中恢复了四个强有力的主要类群，对应于Ihsanalshehbazia gen. nov.，Friedrichkarlmeyeria gen. nov.，Microthlaspi s.str.，和Nursea s.l.此外，还报道了小刺蛾属（Microthlaspi）的两个新种，M. nov.和M.东方地中海型新种，发现，这是很好的支持形态和分子数据。此外，M。erraticum comb. nov.（二倍体）和M. Perfoliatum s.str.（多倍体）是不同的种，在遗传学上广泛分离，但在几个形态特征上有一些重叠。文中对新种和以前收载的各种作了详细描述、分类学注释、地理分布和线条图。此外，目前的分类状态的部落Coluteocarpeae进行了简要的讨论，它的结论是，虽然几个年度分类群是明显不同的Numbleea，许多多年生类群，经过彻底的系统发育和形态学调查，可能要合并与本属。
The genus Thlaspi has been variously subdivided since its description by Linnaeus in 1753, but due to similarities in fruit shape several segregates have still not gained broad recognition, despite the fact that they are not directly related to Thlaspi. This applies especially to segregates now considered to belong to the tribe Coluteocarpeae, which includes several well-studied taxa, e.g., Noccaea caerulescens (syn. Thlaspi caerulescens), and the widespread Microthlaspi perfoliatum (syn. Thlaspi perfoliatum). The taxonomy of this tribe is still debated, as a series of detailed monographs on Coluteocarpeae was not published in English and a lack of phylogenetic resolution within this tribe was found in previous studies. The current study presents detailed phylogenetic investigations and a critical review of morphological features, with focus on taxa previously placed in Microthlaspi. Based on one nuclear (ITS) and two chloroplast (matK, trnL-F) loci, four strongly supported major groups were recovered among the Coluteocarpeae genera included, corresponding to Ihsanalshehbazia gen. nov., Friedrichkarlmeyeria gen. nov., Microthlaspi s.str., and Noccaea s.l. In addition, two new species of Microthlaspi, M. sylvarum-cedri sp. nov. and M. mediterraneo-orientale sp. nov., were discovered, which are well supported by both morphological and molecular data. Furthermore, M. erraticum comb. nov. (diploid) and M. perfoliatum s.str. (polyploid) were shown to be distinct species, phylogenetically widely separate, but with some overlap in several morphological characters. Detailed descriptions, notes on taxonomy, geographical distribution, and line drawings for the new species and each species previously included in Microthlaspi are provided. In addition, the current taxonomic state of the tribe Coluteocarpeae is briefly discussed and it is concluded that while several annual taxa are clearly distinct from Noccaea, many perennial taxa, after thorough phylogenetic and morphological investigations, may have to be merged with this genus.