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Variability amongst strains of Fusarium poae assessed by vegetative compatibility and RAPD polymorphism
Author(s) -
KERÉNYI Z.,
TÁBORHEGYI É.,
POMÁZI A.,
HORNOK L.
Publication year - 1997
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1046/j.1365-3059.1997.d01-88.x
Subject(s) - biology , rapd , intraspecific competition , genetics , genetic variability , botany , genetic diversity , genotype , zoology , gene , population , demography , sociology
Vegetative compatibility tests and random amplification of polymorphic DNA (RAPD) were used to assess genetic relationships amongst 54 strains of Fusarium poae obtained from various geographical regions. Twenty‐seven strains were assigned to eight multiple member vegetative compatibility groups (VCGs), while the other 27 isolates were found to form single‐member VCGs. There was a partial correlation between VCG and geographical origin, but the relationship was not always clear. However, no correlation was observed between the VCG and the host plant of origin. RAPD patterns were closely associated with VCGs in all cases. Members of VCGs that were interconnected by bridging isolates formed common branches in the phenogram constructed on the basis of the RAPD patterns, while strains that belonged to single‐member VCGs were scattered throughout the phenogram. These data demonstrate that the combination of traditional and molecular methodologies allows reliable intraspecific subdivisions in an asexual fungus, which is a secondary invader of a wide range of host plants, and so has never been subject to the intense selection pressure of a single host species and lacks pathogenic subgroups.