Available online 1 July 2016; http://dx.doi.org/Notes: Ggt was introduced as a variety of G. graminis for the wheat take-all fungus (Walker 1972). Walker (1972) distinguished Ggt from Ggg and Gga in their hyphopodial morphology, ascospore size and pathogenicity. In Ggt hyphopodia are not lobed as in Ggg, ascospores are shorter than in Gga, and Ggt is pathogenic to wheat. In our study, isolates received as Ggt grouped in a clade (Fig. 2), representing different species from G. graminis and G. avenae ... Gaeumannomyces tritici is the most aggressive species in the genus, is widespread, and found mainly on Triticum, but was also reported growing on other hosts as well. In our phylogenetic tree this species was represented by isolates from Triticum, Hordeum, Elymus repens and Agropyron.