Distephanus的分子系统学支持建立一个新的部落--Distephaneae(菊科)

IF 2.3 2区 生物学 Q2 PLANT SCIENCES
M R Gostel, Benoit Loeuille, Mariana Henriques Santana, Carol L Kelloff, Raymund Chan, Ana Rita Giraldes Simões, Isabel Larridon, Vicki A Funk
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引用次数: 0

摘要

Distephanus Cass.由 43 种独特的灌木和小乔木组成,历史上曾被归入铁线蕨科(菊科)。本研究采用迄今为止最广泛的 Distephanus 取样,旨在检验该属的单系性并促进其分类。利用核基因组和质粒基因组的四个分子标记进行了分子系统发育分析。这些数据还支持进行分化年代分析,以了解 Distephanus 和其他相关属的分化事件发生的时间,并支持进行祖先区域重建分析,以推断该属物种多样性的生物地理历史。研究结果表明,按照目前的划分,Vernonieae 并非单系,事实上,Distephanus 是由 Vernonieae 和另一族 Moquinieae 组成的一个支系的姐妹群,而 Moquinieae 仅包括两个仅限于巴西的物种。根据这些发现,Distephanus 被归入一个我们在此描述的新支系 Distephaneae。这个新族包括 41 个 Distephanus 物种,它们很容易与 Moquinieae 和 Vernonieae 区分开来,因为它们的小花具有黄色花冠和三出叶。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Molecular phylogenetics of Distephanus supports the recognition of a new tribe, Distephaneae (Asteraceae)
Distephanus Cass. comprises 43 distinctive species of shrubs and small trees that have been placed historically within the ironweed tribe, Vernonieae (Asteraceae). Using the most expansive sampling of Distephanus to date, this study aims to test the monophyly of this genus and facilitate its classification. Molecular phylogenetic analyses were conducted using four molecular markers from the nuclear and plastid genomes. These data also supported divergence dating analyses that were performed to understand the timing of diversification events within Distephanus and other related genera as well as ancestral area reconstruction analyses to infer the biogegraphic history of species diversity in this group. Results from this study indicate that, as currently circumscribed, Vernonieae is not monophyletic and that Distephanus is, in fact, sister to a clade that comprises Vernonieae and another tribe, Moquinieae, which only includes two species restricted to Brazil. On the basis of these findings, Distephanus is classified in a new tribe that we describe here, Distephaneae. This new tribe comprises 41 species of Distephanus that are easily distinguished from Moquinieae and Vernonieae based on the presence of florets with yellow corollas and trinervate leaves.
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来源期刊
CiteScore
5.70
自引率
8.30%
发文量
54
审稿时长
3.5 months
期刊介绍: The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.
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