Take-all or nothing.
Take-all or nothing.
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DOI：
10.1016/j.simyco.2016.06.002
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发表时间：
2016
影响因子：
16.5
通讯作者：
Crous PW
中科院分区：
文献类型：
--
作者：
Hernández-Restrepo M;Groenewald JZ;Elliott ML;Canning G;McMillan VE;Crous PW
禾本科全蚀病是由禾顶囊壳（Gaeumannomycesgraminis）引起的禾本科病害。根据子囊孢子大小、菌丝柄形态和寄主选择性，可将禾谷螟分为4个变种。基于ITS、LSU、tef1和rpb1的部分基因序列，结合形态学和多位点系统发育学分析，明确了全冠囊壳属（Gaeumannomyces）种间和变种间的界限。两个新属，Falciphoriella和Gaeumannomycella随后被引入Magnaporthaceae。由此产生的遗传学揭示了几个神秘的物种以前被忽视的内Gaeumannomyces。革壳菌属的分离物分布在4个主要分支中，其中19个种可被界定，其中12个是新的科学。结果表明，禾顶囊壳原变种（Gaeumannomycesgraminisvar.燕麦全囊壳（Gaeumannomyces graminis var.）三粒小麦代表遗传上不同于禾谷小麦的物种，为此引入了新的组合燕麦小麦和三粒小麦小麦。根据分子数据，形态和主机的喜好，小麦全蚀病菌变种。maydis被认为是根生大豆（G.radicola）的异名。此外，还报道了小麦全蚀病菌Gaeumannomyces graminis var.燕麦被指定为有助于稳定该名称的应用。
Take-all disease of Poaceae is caused by Gaeumannomyces graminis (Magnaporthaceae). Four varieties are recognised in G. graminis based on ascospore size, hyphopodial morphology and host preference. The aim of the present study was to clarify boundaries among species and varieties in Gaeumannomyces by combining morphology and multi-locus phylogenetic analyses based on partial gene sequences of ITS, LSU, tef1 and rpb1. Two new genera, Falciphoriella and Gaeumannomycella were subsequently introduced in Magnaporthaceae. The resulting phylogeny revealed several cryptic species previously overlooked within Gaeumannomyces. Isolates of Gaeumannomyces were distributed in four main clades, from which 19 species could be delimited, 12 of which were new to science. Our results show that the former varieties Gaeumannomyces graminis var. avenae and Gaeumannomyces graminis var. tritici represent species phylogenetically distinct from G. graminis, for which the new combinations G. avenae and G. tritici are introduced. Based on molecular data, morphology and host preferences, Gaeumannomyces graminis var. maydis is proposed as a synonym of G. radicicola. Furthermore, an epitype for Gaeumannomyces graminis var. avenae was designated to help stabilise the application of that name.