Gyromitra (Discinaceae, Pezizales) 的三基因座系统发育及两个隐种的发现。
A three-locus phylogeny of Gyromitra (Discinaceae, Pezizales) and discovery of two cryptic species.
机构信息
a State Key Laboratory of Mycology , Institute of Microbiology, Chinese Academy of Sciences , Beijing 100101 , People's Republic of China.
出版信息
Mycologia. 2019 Jan-Feb;111(1):69-77. doi: 10.1080/00275514.2018.1515456. Epub 2018 Dec 13.
Gyromitra species are known as "false morels" and produce cerebriform or discoid ascocarps. The genus is widely distributed in the Northern Hemisphere, and some species are poisonous. Infrageneric phylogenies based on 28S nuc rDNA (28S) are available, but molecular analyses derived from other genes are lacking. In this study, Gyromitra specimens deposited in HMAS were reexamined. Phylogenies inferred from 28S, nuc rDNA internal transcribed spacers (ITS1-5.8S-ITS2 = ITS), and the translation elongation factor 1-α (TEF1) gene were obtained, and four clades were revealed among 13 species. Two new cryptic species of Gyromitra, G. pseudogigas, sp. nov. and G. tianshanensis, sp. nov., are described. Gyromitra pseudogigas has saddle-shaped apothecia similar to those of G. infula and is sister to G. gigas in the phylogeny. Gyromitra tianshanensis clusters with G. infula and G. xinjiangensis but differs in morphology and sequence data.
鹅膏菌属物种被称为“假羊肚菌”，产生脑状或盘状子实体。该属广泛分布于北半球，有些物种有毒。已经有基于 28S 核 rDNA（28S）的种下系统发育，但缺乏其他基因的分子分析。在这项研究中，重新检查了存放在 HMAS 的鹅膏菌标本。从 28S、核 rDNA 内转录间隔区（ITS1-5.8S-ITS2=ITS）和翻译延伸因子 1-α（TEF1）基因推断出的系统发育，在 13 个物种中揭示了四个进化枝。描述了两个新的鹅膏菌属隐种，即 Gyromitra pseudogigas，sp. nov. 和 Gyromitra tianshanensis，sp. nov.。Gyromitra pseudogigas 具有类似于 Gyromitra infula 的鞍状子实体，在系统发育中与 Gyromitra gigas 为姐妹群。Gyromitra tianshanensis 与 Gyromitra infula 和 Gyromitra xinjiangensis 聚类，但在形态和序列数据上有所不同。
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