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首页> 外文期刊>Mycologia >Molecular phylogeny of dogwood anthracnose fungus (Discula destructiva)and the Diaporthales
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Molecular phylogeny of dogwood anthracnose fungus (Discula destructiva)and the Diaporthales

机译：山茱an炭疽病真菌（Discula destructiva）和飞虱的分子系统发育

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摘要

Dogwood anthracnose, caused by Discula destructiva Redlin (1991), is a disease of several native dogwood species in North America. A teleomorph has not been found since the first reports of this disease in the 1970s, although the conidial state suggested a relationship to diaporthalean species. Phylogenetic analyses based on nuclear small subunit rDNA sequences of 47 perithecial ascomycetes placed D. destructiva into the Diaporthales with high bootstrap support. A phylogeny of 20 diaporthalean species based on large subunit rDNA inferred three major clades in the Diaporthales. Discula destructiva and four other Discula species formed a clade with Plagiostoma euphorbiae, Gnomonia padicola, G. setacea, Pleuroceras pleurostylum, Linospora capreae, Amphiporthe castanea, Apioplagiostoma aceriferum, Melanconis marginalis, and Apiosporopsis carpinea. Its sister group included Cryphonectria parasitica, Cryptodiaporthe corni, Endothia eugeniae, Valsa ambiens subspecies leucostomoides, and Apiognomonia supraseptata. Diaporthe phaseolorum formed a distinct basal branch. A primer pair (RPB2-P2F and RPB2-P3R) was developed to amplify a part of the gene encoding the second largest subunit of RNA polymerase II (RPB2) based on published pyrenomycete sequences. The RPB2 phylogeny supported the close relationship of D. destructiva and the diaporthalean species. Characters of pigmentation and anamorph agree with the phylogeny to some extent and emphasize the importance of anamorphs and pigmentation in the taxonomy of the Diaporthales. Family concepts based on perithecium position, ascus persistence, and ascospore morphology were rejected, and a new phylogenetic classification is needed.
机译：由Discula destructiva Redlin（1991）引起的山茱an炭疽病是北美几种本地山茱wood的疾病。自从1970年代首次报道该病以来，就没有发现过变种，尽管分生孢子菌的状态表明它与透虫种类有关。系统发育分析基于核小亚单位rDNA序列的47种鞘膜囊菌，将D. destructiva置于带高自举支持的Diaporthales中。基于大亚基rDNA的20个通蚊物种的系统发育推断出了通蚊中的三个主要进化枝。破损的Discusula和四个其他Discusula物种与大戟Piagiostoma，大戟Gnomonia padicola，G。setacea，Pleuroceras pleurostylum，Linospora capreae，Amphophethe castanea，Apioplagiostoma aceriferum，Melanconis marginalis和Apiosporopsis carpinea形成了进化枝。它的姊妹群包括寄生的隐孢子虫，山角隐孢子虫，洋紫菜，缬草亚种leucostomoides和上蚜虫。菜豆形成了一个独特的基础分支。开发了引物对（RPB2-P2F和RPB2-P3R），以基于已公开的嗜热菌序列扩增编码RNA聚合酶II（RPB2）第二大亚基的基因的一部分。 RPB2的系统发育支持毁灭性衣藻和渗虫物种的密切关系。色素沉着和无性型的特征在一定程度上与系统发育相吻合，并强调了变形无色和色素沉着在飞虱分类学中的重要性。拒绝基于皮层位置，角膜持久性和子囊孢子形态的家庭观念，需要新的系统发育分类。

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