@ARTICLE{TreeBASE2Ref31153, author = {Yusuke Yamaguchi and Jamjan Meeboon and Vasyl P. Heluta and Shu-Yan Liu and Feng Jing and Susumu Takamatsu}, title = {Phylogeny and taxonomy of Erysiphe species (powdery mildew: Erysiphales) occurring on the ashes (Fraxinus spp.)}, year = {2021}, keywords = {biogeography, co-evolution, epitype, Erysiphe neofraxini, new species}, doi = {10.47371/mycosci.2020.11.009}, url = {http://}, pmid = {}, journal = {Mycoscience}, volume = {62}, number = {2}, pages = {115--123}, abstract = {The genus Fraxinus (Oleaceae), known as ash trees, comprise 43 recognized species and are distributed in temperate and subtropical regions of the northern hemisphere. Two Erysiphe (sect. Uncinula) species have been known on Fraxinus spp. so far. In this study, Fraxinus powdery mildews from wide areas of the world were collected to make molecular and morphological analyses. These specimens are divided into three distinct molecular phylogeny groups which are distinguishable by their morphology and/or host plants. The fungus occurring on F. apertisquamifera and F. lanuginosa is described as a new species Erysiphe neofraxini. Epitypes are designated for E. fraxinicola and E. salmonii. In traditional species delimitation, many hosts were shared by E. fraxinicola and E. salmonii, but the current analyses strongly suggest strict host specificity among these three powdery mildew species. Evolutionary timing calculated by molecular clock analysis suggests co-evolution of powdery mildews with their Fraxinus hosts. } }

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