@ARTICLE{TreeBASE2Ref21648, author = {Susumu Takamatsu and Sanae Matsuda and Banga Grigaliunaite}, title = {Comprehensive phylogenetic analysis of genus Golovinomyces (Ascomycota: Erysiphales) reveals close evolutionary relationships with their host plants}, year = {2013}, keywords = {28S rDNA evolution ITS molecular clock phylogeny powdery mildew Asteraceae}, doi = {10.3852/13-046}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {105}, number = {5}, pages = {1135--1152}, abstract = {The Erysiphaceae are originally tree-parasitic and host shift from trees to herbs may have occurred many times independently in the respective tribes and genera. Golovinomyces, a genus of the tribe Golovinomyceteae, is strictly restricted to herbaceous plants in their host ranges, which suggests that host shift from trees to herbs occurred only once in the lineage leading to this genus and expanded their host ranges into herbaceous plants since after. In order to investigate the evolutionary relationships between Golovinomyces and their host plants, we conducted comprehensive molecular phylogenetic analysis of this genus using 183 nucleotide sequences of ITS and 28S rDNA regions from samples collected worldwide. These sequences were divided into 11 distinct lineages. Ten of the 11 lineages consist of sequences from each single plant family or tribe, which suggests close evolutionary relationships of Golovinomyces and their host plants. Especially, the basal five clades were occupied by the sequences from each single tribe of the Asteraceae. This result supports the previous speculation that co-speciation events occurred between asteraceous hosts and Golovinomyces in the early evolution stage of this genus. The lineage XI situating at the most derived position of the tree includes sequences from wide range of host families and is divided into many species with close genetic affinity. Sequences from putative G. orontii group separated into three groups, which suggests that G. orontii is a species complex.} }

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