Phylogeny of the Gyalectales and Ostropales (Ascomycota, Fungi): among and within order relationships based on nuclear ribosomal RNA small and large subunits
Phylogeny of the Gyalectales and Ostropales (Ascomycota, Fungi): among and within order relationships based on nuclear ribosomal RNA small and large subunits
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DOI：
10.1016/s1055-7903(02)00214-2
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发表时间：
2002-10-01
影响因子：
4.1
通讯作者：
Lutzoni, F
中科院分区：
文献类型：
--
作者：
Kauff, F;Lutzoni, F
尽管在形态和解剖上有许多相似之处，但Gyalectales(地衣化子囊菌)和Ostropales(地衣化子囊菌)和Ostropales(地衣化子囊菌)两个目被认为彼此之间存在着遥远的亲缘关系，它们在子囊菌门中的位置尚未确定。为了估计这些类群之间的关系以及它们在子囊菌纲中各自的系统发育位置，我们使用最大简约、最大似然和贝叶斯统计方法，使用马尔科夫链蒙特卡罗算法分析了核小亚单位和大亚基核糖体RNA基因的DNA序列。用Bootstrap估计的对内部分支的支持度与贝叶斯后验概率进行比较。我们在这里报告说，在目前的范围内，介形石门是异形的，而介形石门是S.l。包括Gyalectales和Trapeliaceae。单月形子囊膜亚纲被重新描述为包括这里定义的Ostropales s.l和担子菌科。Dimerella和Coenogonium是同属，Petractis thelotemella和P.hypoleuca与Gyalecta属的成员重新结合。除了需要更少的计算时间外，贝叶斯系统发育推理还恢复了与传统启发式搜索相同的拓扑结构，使用最大似然法作为优化标准，在估计较短内部分支的支持度方面似乎优于Bootstrapping。(C)2002年埃尔塞维尔科学公司(美国)。版权所有。
Despite various morphological and anatomical similarities, the two orders Gyalectales (lichenized ascomycetes) and Ostropales (lichenized and non-lichenized ascomycetes) have been considered to be distantly related to each other and their position within the Ascomycota was unsettled. To estimate relationships within these groups and their respective phylogenenetic placement within the Ascomycota, we analyzed DNA sequences from the nuclear small and large subunit ribosomal RNA genes using Maximum Parsimony, Maximum Likelihood, and Bayesian statistics with Markov chain Monte Carlo algorithms. Support for internal branches estimated with bootstrap was compared to Bayesian posterior probabilities. We report here that the Ostropales, in their current circumscription, are paraphyletic, and that the Ostropales s.l. include the Gyalectales and Trapeliaceae. The Unitunicate Ascohymenials are redelineated to include the Ostropales s.l., as defined here, and the Baeomycetaceae. Dimerella and Coenogonium are congeneric, and Petractis thelotremella and P. hypoleuca are reunited with members of the genus Gyalecta. In addition to requiring less computational time, Bayesian inference of phylogeny recovered the same topology as a conventional heuristic search using Maximum Likelihood as the optimization criterion and seems superior to bootstrapping in estimating support for short internal branches. (C) 2002 Elsevier Science (USA). All rights reserved.