Two new genera of Gentianinae (Gentianaceae): Sinogentiana and Kuepferia supported by molecular phylogenetic evidence
Two new genera of Gentianinae (Gentianaceae): Sinogentiana and Kuepferia supported by molecular phylogenetic evidence
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DOI：
10.12705/632.5
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发表时间：
2014-04-01
期刊：
影响因子：
3.4
通讯作者：
Muellner-Riehl, Alexandra N.
中科院分区：
文献类型：
--
作者：
Favre, Adrien;Matuszak, Sabine;Muellner-Riehl, Alexandra N.
龙胆亚族包括龙胆属、雷公藤属、后龙胆属和 Crawfurdia 属，是龙胆科物种最丰富的分支之一。龙胆亚科的属属水平上仅存在一些分类学上的不确定性：包括龙胆组。 Gentiana 中的 Otophora 和 Metagentiana 的多系性质。在这两种情况下，早期研究都缺乏数据来解决歧义并为这些谱系的可靠分类学处理提供基线。在本研究中，我们增加了龙胆科测序的物种数量。 Otophora 和 Metagentiana，使用核 (ITS) 和质体 (trnL-F、atpB-rbcL) 标记的组合。我们通过最大似然分析和贝叶斯分析重建了龙胆亚科的系统发育关系。我们的结果表明，龙胆宗。 Otophora 是单系的，与 Metagentiana 的关系比与 Gentiana 的关系更密切。我们建议排除龙胆教。来自 Gentiana 的 Otophora 并将该类群提升至此处描述的属级别，名为 Kuepferia。当排除 M striata 和 M Souliei 这两个物种时，Metagentiana 是单系的，这里描述为新属 Singentiana。
Subtribe Gentianinae, encompassing Gentiana, Tripterospermum, Metagentiana and Crawfurdia, represents one of the most species-rich clades of Gentianaceae. Only a few taxonomic uncertainties have remained at generic level in subtribe Gentianinae: the inclusion of Gentiana sect. Otophora in Gentiana, and the polyphyletic nature of Metagentiana. In both cases, data were lacking in earlier studies to resolve ambiguities and provide the baseline for a solid taxonomic treatment of these lineages. For the present study, we increased the number of species sequenced for Gentiana sect. Otophora and Metagentiana, using a combination of nuclear (ITS) and plastid (trnL-F, atpB-rbcL) markers. We reconstructed phylogenetic relationships in Gentianinae conducting maximum likelihood and Bayesian analyses. Our results show that Gentiana sect. Otophora is monophyletic and more closely related to Metagentiana than to Gentiana. We suggest excluding Gentiana sect. Otophora from Gentiana and elevating this group to the rank of genus described here under the name Kuepferia. Metagentiana is monophyletic when excluding two species, M striata and M souliei, here described as the new genus Sinogentiana.