First comprehensive phylogenetic analysis of the genus Erysiphe (Erysiphales, Erysiphaceae) II: the Uncinula lineage

被引：42

作者：

Takamatsu, Susumu ^{[1
]}

Ito , Hanako ^{[1
]}

Shiroya, Yoshiaki ^{[1
]}

Kiss, Levente ^{[2
]}

Heluta, Vasyl ^{[3
]}

机构：

[1] Mie Univ, Grad Sch, Dept Bioresources, Tsu, Mie 5148507, Japan

[2] Hungarian Acad Sci MTA, Agr Res Ctr, Inst Plant Protect, H-1525 Budapest, Hungary

[3] Natl Acad Sci Ukraine, MG Kholodny Inst Bot, UA-01601 Kiev, Ukraine

来源：

MYCOLOGIA | 2015年 / 107卷 / 05期

基金：

日本学术振兴会;

关键词：

28S rDNA; appendage; host relationship; ITS; molecular clock; powdery mildew; POWDERY MILDEW FUNGI; SECT; UNCINULA; EVOLUTION; SEQUENCE; CLASSIFICATION; ASCOMYCOTA; JAPONICA; REVEALS; ORIGIN; NOV;

D O I：

10.3852/15-062

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Phylogenetic relationships of the Uncinula lineage, which is the basal group in the genus Erysiphe, were investigated with 167 sequences of nuc ITS1-5. 8S-ITS2 and the 28S rDNA regions. Backbone tree analyses with six datasets and two tree-constructing methods revealed that the Uncinula lineage is, divided into seven distinct clades. Glades 1-5 each contained a representative powdery mildew species, namely E. australiana in Glade 1, E. liquidambaris in Glade 2, E. adunca in Glade 3, E. fraxinicola in Glade 4 and E. actinidiae in Glade 5. Glade 6 comprises 71 sequences including the Microsphaera lineage and 17 species of the Uncinula lineage, such as E. carpinicola, E. carpinilaxiflorae, E. miyabei, E. glycines and E. necator. Topology tests supported the Microsphaera lineage forming a monophyletic clade in Glade 6, suggesting that Microsphaera-type appendages appeared only once in this clade to diverge into the Microsphaera lineage. Glade 7 consists of 72 sequences containing 30 species, including species of sects. Californiomyces and Typhulochaeta, four species from Nothofagus, species of sect. Erysiphe parasitising herbaceous plants belonging to the Asteraceae, Rosaceae and Saxifragaceae. Molecular clock analysis suggests that the major seven clades appeared 50-30 million years ago (Ma) in the Paleogene Period. The Microsphaera lineage may have split from the Uncinula lineage at the boundary of the Paleogene and Neogene, when appendages with dichotomously branched tips appeared. The clade of the species on Nothofagus split from the northern hemisphere species about 20-10 million years ago (Ma) in the Miocene Epoch, and host-shift from trees to herbs also might have occurred in this period.

引用

页码：903 / 914

页数：12

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