Mycologia (2013) 105, 1019-1029

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Jing Luo and Ning Zhang (2013)
Magnaporthiopsis, a new genus in Magnaporthaceae (Ascomycota)
Mycologia 105 (4), 1019-1029
Abstract: The phylogenetic relationships among taxa in the Magnaporthaceae are investigated based on DNA sequences of multiple genes including SSU, ITS, LSU, MCM7, RPB1 and TEF1. The genera Magnaporthe and Gaeumannomyces are shown to be polyphyletic and their members are divided into four major groups based on the phylogenetic analyses. Considering morphological, biological and molecular data, we establish a new genus, Magnaporthiopsis. It is characterized by black and globose perithecia with a cylindrical neck, two-layered perithecial wall, clavate asci with a refractive apical ring, fusiform to fusoid and septate ascospores, simple hyphopodia, and Phialophora-like anamorph. Species in this genus are necrotrophic parasites infecting roots of grasses. Three new combinations, Magnaporthiopsis poae, M. rhizophila and M. incrustans, are proposed accordingly. Pyricularia is suggested as the generic name for the rice blast fungus over Magnaporthe, following Article 59.1 of the International Code of Nomenclature for algae, fungi and plants. A new combination, Nakataea oryzae, is proposed for the rice stem rot fungus.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Ning Zhang

Research topic(s) for pests/diseases/weeds:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Pyricularia oryzae
Nakataea oryzae
Magnaporthiopsis poae