C. Augustin et al., RAPD-based inter- and intravarietal classification of fungi of the Gaeumannomyces-Phialophora complex, J PHYTOPATH, 147(2), 1999, pp. 109-117
Citations number
38
Categorie Soggetti
Plant Sciences
Journal title
JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT
The suitability of randomly amplified polymorphic DNAs (RAPD) for different
iation at the varietal and intravarietal level was tested on several hundre
d isolates of the Gaeumannomyces-Phialophora (G-P) complex from different g
eographic locations and host plants. Amplification products obtained using
two decamer primers allowed differentiation between Gaeumannomyces graminis
and Gaeumannomyces cylindrosporus and between the three varieties of Gaeum
annomyces graminis, as well as further division at the intravarietal level.
Thus, isolates of the causal agent of take-all on cereals, Gaeumannomyces
graminis var. tritici were divided into six subgroups by amplification with
these two primers. There is some evidence for an association between host
preference and RAPD subgroups but further work is needed to confirm this an
d to determine the importance of these subgroups. This fast and easy method
is a useful tool for investigating the occurrence and distribution of this
pathogen and for studying changes in the populations of species and subgro
ups of Gaeumannomyces in cereal cropping systems.