A new Neotyphodium species from Festuca parvigluma Steud. grown in China
A new Neotyphodium species from Festuca parvigluma Steud. grown in China
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DOI：
10.3852/08-181
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发表时间：
2009-09
期刊：
影响因子：
2.8
通讯作者：
Yong-gan Chen;Yan-ling Ji;Han-shou Yu;Zhi-wei Wang
中科院分区：
文献类型：
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作者：
Yong-gan Chen;Yan-ling Ji;Han-shou Yu;Zhi-wei Wang
Neotyphodium物种进化自Epichophodium物种，并且是许多冷季型草中的无性、种传内生菌。本文提出了一个分布于中国的小颖羊茅属新种。形态学、寄主特异性和分子系统学证据支持对该新种的认识。β-微管蛋白基因（tubB）内含子和翻译延伸因子1-α基因（tefA）内含子的序列在所有5个菌株中均以两个拷贝存在。系统发育分析表明，copy 1与E. yangzii与E. typhina在ETC分支，表明这个新的物种可能起源于这两个分支之间的成员杂交的结果。根据寄主植物的分布区，建议将该新种命名为Neotyphodium sinofestucae。
Neotyphodium species evolved from Epichloë species and are asexual, seedborne endophytes in many cool-season grasses. Here we propose a new species inhabiting Festuca parvigluma native to China. Morphology, host specificity and molecular phylogenetic evidence supported recognition of this new species. Sequences of β-tubulin gene (tubB) introns and translation elongation factor 1-α gene (tefA) introns were present as two copies in all five isolates examined. In phylogenetic analyses copy 1 was closely related to E. yangzii in the EBY clade and copy 2 with E. typhina in the ETC clade, indicating this new species might have originated as a result of hybridization between members of these two clades. Referring to the distribution area of host plants, Neotyphodium sinofestucae is proposed for this new species.