Multigene phylogeny of filamentous ambrosia fungi associated with ambrosia and bark beetles
Multigene phylogeny of filamentous ambrosia fungi associated with ambrosia and bark beetles
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DOI：
10.1016/j.mycres.2009.03.003
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发表时间：
2009-08-01
影响因子：
--
通讯作者：
Breuil, Colette
中科院分区：
文献类型：
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作者：
Alamouti, Sepideh Massoumi;Tsui, Clement K. M.;Breuil, Colette
大多数“ambrosia”真菌是一个异质组的ophiostomatoids，包括无性型属Ambrosiella，Raffaelea和Dryadomyces的成员。这些真菌的形态特征的基础上的分类已被复杂的这些功能是描述性差，并已演变趋同。在这项工作中，我们报告了最大简约和贝叶斯系统发育分析的多基因数据集（nSSU rDNA，nLSU rDNA和β-微管蛋白基因）从67个类群，包括成员属Ambrosiella，Raffaelea和Dryadomyces和一组不同的ophiostomatoid亲属。讨论了Ambrosiella属的系统发育地位及其与Ophiostomatales有性型和无性型属的关系。我们的分析表明，13个已被分配到Ambrosiella属的物种中有10个与Ophiostomatales内的真形属Grosmannia或Ophiostoma有关。多基因分析和扩大的分类单元取样提供了一个更高的分辨率的物种系统发育和澄清Ambrosiella associates ambrosia和小蠹和Raffaelea和Dryadomyces属的密切相关的物种之间的详细关系。我们讨论的困难，使用分生孢子的形态和分生孢子发生的模式重新定义Ambrosiella物种的系统分类。最后，我们报告的分子分类之间的相关性Ophiostomatales相关种Ambrosiella和Raffaelea和他们的生态位。(C)2009年英国真菌学会。由爱思唯尔有限公司出版。保留所有权利。
Most 'ambrosia' fungi are members of a heterogeneous group of ophiostomatoids that includes the anamorph genera Ambrosiella, Raffaelea and Dryadomyces. The taxonomy of these fungi based on morphological features has been complicated by these features being poorly descriptive and having evolved convergently. In this work we report maximum parsimony and Bayesian phylogenetic analysis of a multigene dataset (nSSU rDNA, nLSU rDNA and beta-tubulin gene) from sixty-seven taxa that include members of genera Ambrosiella, Raffaelea and Dryadomyces and a diverse set of ophiostomatoid relatives. We discuss the phylogenetic status of genus Ambrosiella and its relationships with representatives of Ophiostomatales teleomorph and anamorph genera. our analysis shows that ten of the thirteen species that had been assigned to the genus Ambrosiella are related to the teleomorph genera Grosmannia or Ophiostoma, within the Ophiostomatales. The multigene analysis and expanded taxon samplings provide a higher resolution for the species phylogeny and clarify detailed relationships between Ambrosiella associates of ambrosia and bark beetles and the closely related species of genera Raffaelea and Dryadomyces. We discuss difficulties in using the morphology of conidiophores and the mode of conidiogenesis to re-define the phylogenetic classification of Ambrosiella species. Finally, we report a correlation between the molecular classification of Ophiostomatales-related species of Ambrosiella and Raffaelea and their ecological niches. (C) 2009 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.