Molecular phylogeny of eastern Asian species of Amanita (Agaricales, Basidiomycota): taxonomic and biogeographic implications
Molecular phylogeny of eastern Asian species of Amanita (Agaricales, Basidiomycota): taxonomic and biogeographic implications
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发表时间：
2004-10
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通讯作者：
Lf Zhang;Jb Yang;Z. Yang
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作者：
Lf Zhang;Jb Yang;Z. Yang
使用来自核核糖体 DNA 的内部转录间隔区 (ITS) 区域和大亚基 (nLSU) 的序列数据估计了鹅膏菌属的系统发育关系、分类学和生物地理学，重点是东亚物种。两个传统上接受的亚属的分离并没有得到很好的支持。通过不同的分析方法和不同地区的数据集，鹅膏菌科、伞形科、伞形科、鬼笔科、Validae 和 Amidella 的每个部分都被支持为单系。 Lepidella组的单系性仍不清楚。推断出一些生物地理学和分类学意义：（1）少数鹅膏菌种广泛分布于东亚、欧洲和北美。北半球一些先前公认的分离物种的样本并不是单系的。因此，本研究不支持这些物种假定的洲际间断分布。 (2)东亚与欧洲的鹅膏菌生物地理关系较为密切，有几个类群是两个地区共有的，而东亚与北美之间的配对或近缘物种也较为常见，但很少被分子数据证实为同一物种的分离种群。北美的一些鹅膏菌属物种，其名称以欧洲材料为基础，应被视为不同的物种； (3) 西南地区少数遗传隐秘的鹅膏菌种有待划定； (4) 不同产地的小豹子实体颜色和形态的差异应解释为环境的改变。
The phylogenetic relationships, taxonomy and biogeography of the genus Amanita with emphasis on eastern Asian species were estimated using sequence data from both internal transcribed spacer (ITS) regions and large subunit (nLSU) of nuclear ribosomal DNA. The separation of the two traditionally accepted subgenera was not well supported. Each section of Amanita, Vaginatae, Caesareae, Phalloideae, Validae and Amidella was supported as monophyletic by different methods of analysis and data sets of different regions. The monophyly of section Lepidella remained unclear. A few biogeographic and taxonomic implications were inferred: (1) few species of Amanita are widely distributed throughout eastern Asia, Europe and North America. Samples of some previously recognized disjunct species in the Northern Hemisphere were not monophyletic. Thus, the putative intercontinental disjunct distributions of these species were not supported in this study; (2) biogeographic relationships between Amanita of eastern Asia and Europe are relatively close and several taxa are common to both regions, while paired or closely related species between eastern Asia and North America are relatively common, but rarely have been confirmed as disjunct populations of the same species by molecular data yet. A number of species of Amanita in North America labelled with names based on European materials should be regarded as distinct species; (3) a few genetically cryptic species of Amanita in southwestern China need to be delimited; and (4) variations in colour and morphology of the fruit bodies in A. parvipantherina from different localities should be interpreted as modifications of environment.