Molecular phylogeny of Phoma and allied anamorph genera: towards a reclassification of the Phoma complex.

Mycol Res 2009 Apr 18;113(Pt 4):508-19. Epub 2009 Jan 18.

CBS Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD Utrecht, The Netherlands.

The present generic concept of Phoma is broadly defined, with nine sections being recognised based on morphological characters. Teleomorph states of Phoma have been described in the genera Didymella, Leptosphaeria, Pleospora and Mycosphaerella, indicating that Phoma anamorphs represent a polyphyletic group. In an attempt to delineate generic boundaries, representative strains of the various Phoma sections and allied coelomycetous genera were included for study. Sequence data of the 18S nrDNA (SSU) and the 28S nrDNA (LSU) regions of 18 Phoma strains included were compared with those of representative strains of 39 allied anamorph genera, including Ascochyta, Coniothyrium, Deuterophoma, Microsphaeropsis, Pleurophoma, Pyrenochaeta, and 11 teleomorph genera. The type species of the Phoma sections Phoma, Phyllostictoides, Sclerophomella, Macrospora and Peyronellaea grouped in a subclade in the Pleosporales with the type species of Ascochyta and Microsphaeropsis. The new family Didymellaceae is proposed to accommodate these Phoma sections and related anamorph genera. The present study demonstrated that Phoma radicina, the type species of Phoma sect. Paraphoma and Phoma heteromorphospora, the type species of Phoma sect. Heterospora can be assigned to the Phaeosphaeriaceae and Leptosphaeriaceae respectively.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.mycres.2009.01.002DOI Listing
April 2009

Publication Analysis

Top Keywords

type species
16
phoma
14
phoma sections
12
anamorph genera
12
species phoma
12
allied anamorph
8
representative strains
8
phoma sect
8
genera
6
coelomycetous genera
4
genera included
4
macrospora peyronellaea
4
sequence data
4
phyllostictoides sclerophomella
4
phoma phyllostictoides
4
allied coelomycetous
4
study sequence
4
included study
4
sclerophomella macrospora
4
strains phoma
4

Similar Publications