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Citation for Study 17144

About Citation title: "First comprehensive phylogenetic analysis of the genus Erysiphe (Erysiphales, Erysiphaceae), II. The Uncinula-lineage".
About Study name: "First comprehensive phylogenetic analysis of the genus Erysiphe (Erysiphales, Erysiphaceae), II. The Uncinula-lineage".
About This study is part of submission 17144 (Status: Published).

Citation

Takamatsu S., Ito H., Shiroya Y., Kiss L., & Heluta V. 2015. First comprehensive phylogenetic analysis of the genus Erysiphe (Erysiphales, Erysiphaceae), II. The Uncinula-lineage. Mycologia, 107(5): 903-914.

Authors

  • Takamatsu S.
  • Ito H.
  • Shiroya Y.
  • Kiss L.
  • Heluta V.

Abstract

Phylogenetic relationships of the Uncinula-lineage that is basal group of the genus Erysiphe were investigated using 167 sequences of nuc ITS1-5.8S-ITS2 and the 28S rDNA regions. Backbone tree analyses using six data sets and two tree-constructing methods revealed that the Uncinula-lineage is divided into seven distinct clades. Clade 1?5 contained each one powdery mildew species, namely, E. australiana in Clade 1, E. liquidambaris in Clade 2, E. adunca in Clade 3, E. fraxinicola in Clade 4, and E. actinidiae in Clade 5. Clade 6 was composed of 71 sequences including Microsphaera-lineage and 17 species of Uncinula-lineage, such as E. carpinicola, E. carpini-laxiflorae, E. miyabei, E. glycines, and E. necator. Topology tests supported that Microsphaera-lineage forms a monophyletic clade in Clade 6, suggesting Microsphaera-type appendage appeared only once in this clade to diverge into Microsphaera-lineage. Clade 7 consisted of 72 sequences containing 30 species, including species of sects. Californiomyces and Typhulochaeta, four species from Nothofagus, species of the sect. Erysiphe parasitising herbaceous plants belonging to the Asteraceae, Rosaceae, and Saxifragaceae. Molecular clock analysis suggested 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 in the boundary of Paleogene and Neogene periods, when appendages with dichotomously branched tips appeared. The clade of the species on Nothofagus split from the Northern Hemisphere species in 20?10 Ma in the Miocene Epoch and host-shift from trees to herbs may have occurred in the similar period.

Keywords

28S rDNA, Appendage, Host relationship, ITS, Molecular clock, Powdery mildew

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S17144
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