A comprehensive molecular phylogeny of Cephalotrichum and Microascus provides novel insights into their systematics and evolutionary history

IF 9.5 1区 生物学 Q1 MYCOLOGY Persoonia Pub Date : 2024-06-30 DOI:10.3767/persoonia.2024.52.05
T.P. Wei, Y.M. Wu, X. Zhang, H. Zhang, P.W. Crous, Y.L. Jiang
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Abstract

The genera Cephalotrichum and Microascus contain ecologically, morphologically and lifestyle diverse fungi in Microascaceae (Microascales, Sordariomycetes) with a world-wide distribution. Despite previous studies having elucidated that Cephalotrichum and Microascus are highly polyphyletic, the DNA phylogeny of many traditionally morphology-defined species is still poorly resolved, and a comprehensive taxonomic overview of the two genera is lacking. To resolve this issue, we integrate broad taxon sampling strategies and the most comprehensive multi-gene (ITS, LSU, tef1 and tub2) datasets to date, with fossil calibrations to address the phylogenetic relationships and divergence times among major lineages of Microascaceae. Two previously recognised main clades, Cephalotrichum (24 species)and Microascus (49 species), were re-affirmed based on our phylogenetic analyses, as well as the phylogenetic position of 15 genera within Microascaceae. In this study, we provide an up-to-date overview on the taxonomy and phylogeny of species belonging to Cephalotrichum and Microascus, as well as detailed descriptions and illustrations of 21 species of which eight are newly described. Furthermore, the divergence time estimates indicate that the crown age of Microascaceae was around 210.37 Mya (95% HPD: 177.18–246.96 Mya) in the Late Triassic, and that Cephalotrichum and Microascus began to diversify approximately 27.07 Mya (95% HPD:20.47–34.37 Mya) and 70.46 Mya (95% HPD:56.96–86.24 Mya), respectively. Our results also demonstrate that multigene sequence data coupled with broad taxon sampling can help elucidate previously unresolved clade relationships.
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头癣菌和微囊癣菌的综合分子系统发育为了解其系统学和进化史提供了新的视角
头孢属(Cephalotrichum)和小袋菌属(Microascus)包含小袋菌科(Microascales, Sordariomycetes)中在生态学、形态学和生活方式上多种多样的真菌,分布于世界各地。尽管之前的研究已经阐明头孢霉属和微囊霉属具有高度的多态性,但许多传统形态学定义的物种的 DNA 系统发育仍未得到很好的解决,也缺乏对这两个属的全面分类概述。为了解决这个问题,我们整合了广泛的分类群取样策略和迄今为止最全面的多基因(ITS、LSU、tef1 和 tub2)数据集,并通过化石校准来解决小袋鼠科主要支系之间的系统发生关系和分化时间问题。根据我们的系统发育分析,我们重新确认了之前确认的两个主要支系,即头状花序(Cephalotrichum)(24 种)和小袋鼠(Microascus)(49 种),以及小袋鼠科中 15 个属的系统发育位置。在本研究中,我们提供了 Cephalotrichum 和 Microascus 属物种分类学和系统发育的最新概述,以及 21 个物种的详细描述和图解,其中 8 个物种是新描述的。此外,分化时间估计表明,微囊菌科的冠年龄约为三叠纪晚期的 210.37 Mya(95% HPD:177.18-246.96 Mya),头孢菌和微囊菌开始分化的时间分别约为 27.07 Mya(95% HPD:20.47-34.37 Mya)和 70.46 Mya(95% HPD:56.96-86.24 Mya)。我们的研究结果还表明,多基因序列数据与广泛的类群取样相结合,有助于阐明以前尚未解决的支系关系。
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来源期刊
Persoonia
Persoonia MYCOLOGY-
CiteScore
17.70
自引率
5.50%
发文量
10
审稿时长
3 months
期刊介绍: Persoonia aspires to publish papers focusing on the molecular systematics and evolution of fungi. Additionally, it seeks to advance fungal taxonomy by employing a polythetic approach to elucidate the genuine phylogeny and relationships within the kingdom Fungi. The journal is dedicated to disseminating high-quality papers that unravel both known and novel fungal taxa at the DNA level. Moreover, it endeavors to provide fresh insights into evolutionary processes and relationships. The scope of papers considered encompasses research articles, along with topical and book reviews.
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