Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-2902.
Mycologia. 2002 Jul-Aug;94(4):607-19. doi: 10.1080/15572536.2003.11833189.
Rhizopogon (Basidiomycota, Boletales) is a genus of hypogeous fungi that form ectomycorrhizal associations mostly with members of the Pinaceae. This genus comprises an estimated 100(+) species, with the greatest diversity found in coniferous forests of the Pacific northwestern United States. Maximum parsimony analyses of 54 nuclear ribosomal DNA internal transcribed spacer (ITS) sequences including 27 Rhizopogon and 10 Suillus species were conducted to test sectional relationships in Rhizopogon and examine phylogenetic relationships with the closely related epigeous genus, Suillus. Sequences from 10 Rhizopogon type collections were included in these analyses. Rhizopogon and Suillus were both monophyletic. Rhizopogon section Rhizopogon is not monophyletic and comprised two clades, one of which consisted of two well supported lineages characterized by several long insertions. Rhizopogon sections Amylopogon and Villosuli formed well supported groups, but certain species concepts within these sections were unresolved. Four species from section Fulviglebae formed a strongly supported clade within section Villosuli. Subgeneric taxonomic revisions are presented.
块菌属（担子菌门，牛肝菌目）是一类地下真菌，与松科植物形成外生菌根共生关系。该属约有 100 种（+），在北太平洋西北部的针叶林中分布最为广泛。本研究通过对包括 27 种块菌和 10 种乳牛肝菌在内的 54 个核核糖体 DNA 内转录间隔区（ITS）序列的最大简约分析，检验块菌属的分类关系，并与密切相关的地上生属乳牛肝菌进行了系统发育关系分析。这些分析中包括了 10 种块菌模式标本。块菌属和乳牛肝菌均为单系群。块菌属的 Rhizopogon 节并非单系群，由两个分支组成，其中一个分支由两个具有几个长插入的高度支持的谱系组成。Rhizopogon 节的 Amylopogon 和 Villosuli 形成了高度支持的群组，但这些节中的某些种概念没有得到解决。来自 Fulviglebae 节的四个种在 Villosuli 节内形成了一个强烈支持的分支。本文提出了亚属分类修订。
