4.6 Article

Parahellenia, a new genus segregated from Hellenia (Costaceae) based on phylogenetic and morphological evidence

期刊

PLANT DIVERSITY
卷 44, 期 4, 页码 389-405

出版社

KEAI PUBLISHING LTD
DOI: 10.1016/j.pld.2022.02.001

关键词

Molecular phylogenomics; New genus; New species; Cheilocostus

资金

  1. National Natural Science Foundation of China [32070223]
  2. Biological Resources Programme, Chinese Academy of Sciences [KFJ-BRP-017-19]

向作者/读者索取更多资源

Previous studies have revealed that the genus Hellenia within the family Costaceae is non-monophyletic. This study further confirms the paraphyly of Hellenia through plastid phylogenomic analyses and morphological analyses. A new genus, Parahellenia, is recognized based on the molecular and morphological evidence.
Previous studies recognized three major lineages of the family Costaceae: a South American Glade, an Asian Glade and a Costus Glade. However, the genus Hellenia within the Asian Glade has been shown to be non-monophyletic and its morphology has not been studied carefully. Therefore, the complete plastid genomes of Hellenia species were obtained and the monophyly of Hellenia was tested through four different datasets in this study. Plastid phylogenomic analyses of Costaceae revealed that Hellenia is strongly supported as paraphyletic. Two major clades are recovered, namely the Hellenia s.s. subclade and the Parahellenia subclade. Phylogenetic analyses based on an enlarged taxon sampling of the Asian Glade using a two chloroplast markers dataset (trnK intron and trnL-F spacer) confirmed the paraphyly of Hellenia. Meanwhile, morphological analyses suggested that members of the Parahellenia subclade differ from the remaining Hellenia species in many characters including inflorescences, bracts, stigma, axillary buds, floral tubes and labellum. According to the present molecular and morphological evidence, the latter subclade is recognized as a new genus, Parahellenia. Two new species are described, four new combinations are made, and identification keys are also provided. Copyright (C) 2022 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据