ABSTRACT

Modern taxonomic studies of Agaricomycetes rely on the integrative analyses of morphology, environmental data, geographic distribution, and usually several DNA loci. However, sampling and selection of DNA loci for the analyses are commonly shallow. In this study, we suggest minimal numbers of necessary specimens to sample and DNA loci to analyze in order to prevent inadequate taxonomic decisions in species groups with minor morphological and genealogical differences. We sampled four unlinked nuclear DNA gene regions (nuc rDNA ITS1-5.8S-ITS2, gh63, rpb2, and tef1) to revise the systematics of a common wood-decaying species Basidioradulum radula (Hymenochaetales) on an intercontinental set of specimens collected in the Northern Hemisphere. The DNA loci analyzed violate the genealogical concordance phylogenetic species recognition principles, thus confirming a single-species interpretation. We conclude that Hyphodontia syringae is a younger synonym of B. radula.

摘要

蘑菇纲的现代分类学研究依赖于形态学、环境数据、地理分布和通常几个 DNA 位点的综合分析。然而，用于分析的 DNA 基因座的采样和选择通常很浅。在这项研究中，我们建议尽可能少地取样和分析 DNA 基因座，以防止在形态和谱系差异较小的物种组中进行不适当的分类决策。我们对四个未连接的核 DNA 基因区域（nuc rDNA ITS1-5.8S-ITS2、gh63、rpb2和tef1）进行采样，以修改常见木材腐烂物种Basidioradulum radula 的系统学(Hymenochaetales) 在北半球收集的一组洲际标本上。分析的 DNA 位点违反了谱系一致性系统发育物种识别原则，从而证实了单一物种的解释。我们得出结论，Hyphodontia syringae是B. radula的年轻同义词。