Advances in the phylogeny of the South American cool-season grass genus Chascolytrum (Poaceae, Pooideae): a new infrageneric classification
Advances in the phylogeny of the South American cool-season grass genus Chascolytrum (Poaceae, Pooideae): a new infrageneric classification
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南美冷季草属 Chascolytrum（禾本科、早熟禾亚科）系统发育进展：一种新的属下分类
DOI：
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发表时间：
2019
影响因子：
2.4
通讯作者：
T. Souza
中科院分区：
文献类型：
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作者：
Leonardo Nogueira da Silva;L. Essi;J. Iganci;T. Souza
目前所界定的 Chascolytrum 包括 22-23 个南美物种，这些物种以前被分为 9 个不同的属（Chascolytrum、Briza、Poidium、Calotheca、Microbriza、Gymnachne、Rhombolytrum、Lombardochloa 和 Erianthecium）。由于显着的形态多样性，Chascolytrum s.l. 中的关系。对它们的了解仍然知之甚少，并且无法根据最新的分子系统发育研究提出属下分类。在本研究中，我们结合分子（GBSSI、trnL-trnL-trnF 和 rps16 内含子）和形态特征来研究 Chascolytrum s.l 的系统发育关系。在此基础上，形态学上可诊断的进化枝被识别为八个部分（Calotheca、Chascolytrum、Hildaea、Lombardochloa、Microbriza、Obovatae、Poidium 和 Tricholemma），其中三个是新的，三个是单特异性的。我们描述了每个部分，并与之前为 Briza 属下的类群提出的下属分类进行比较，讨论了新的下属分类。每个部分都提供了大多数物种的分类索引和图像。最后，强调了使用单拷贝核基因和形态学数据来重建包含 Chascolytrum 的未来系统发育。
Chascolytrum, as currently circumscribed, includes 22–23 South American species that were previously included in nine different genera (Chascolytrum, Briza, Poidium, Calotheca, Microbriza, Gymnachne, Rhombolytrum, Lombardochloa and Erianthecium). Due to the remarkable morphological diversity, the relationships in Chascolytrum s.l. have remained poorly understood, and no infrageneric classification could be proposed based on the latest molecular phylogenetic studies. In this study, we combined molecular (GBSSI, trnL-trnL-trnF and rps16 intron) and morphological characters to investigate the phylogenetic relationships in Chascolytrum s.l. Based on this, morphologically diagnosable clades were recognized as eight sections (Calotheca, Chascolytrum, Hildaea, Lombardochloa, Microbriza, Obovatae, Poidium and Tricholemma), of which three are new and three are monospecific. We describe each section and discuss the new infrageneric classification in comparison with the previous infrageneric classification proposed for the group under the genus Briza. A taxonomic key and images for most of the species in each section are provided. Last, the use of single-copy nuclear genes and morphological data for future phylogenetic reconstructions encompassing Chascolytrum is highlighted.
影响因子：
3.4
作者：
Tkach, Natalia;Roeser, Martin;Hoffmann, Matthias H.
通讯作者：
Hoffmann, Matthias H.
影响因子：
2.9
作者：
Saarela, Jeffery M.;Wysocki, William P.;Duvall, Melvin R.
通讯作者：
Duvall, Melvin R.