| heal.abstract |
investigation was carried out into the vegetative compatibility patterns of a collection of 100 Greek Fusarium isolates from carnation and seven Israeli isolates, members of vegetative compatibility group (VCG) 0021 of Fusarium oxysporum f.sp. dianthi (F.o.d.). Of these Greek isolates, 95 were classified as F.o.d. based on pathogenicity on the cultivar White Sim. These isolates were obtained from various carnation cultivars grown in plastic houses or from outdoor cultivation, originating from several parts of the country. Nitrate non-utilizing (nit) mutants were generated from all isolates and used for complementation tests. Representative mutants were tested against nit mutants of isolates of F. oxysporum f.sp. dianthi from France, Germany, Italy, The Netherlands and USA. All Greek F.o.d. isolates were found to belong to the previously described VCG 0021. Non-pathogenic isolates of F. oxysporum, isolates belonging to other special forms of F. oxysporum, and one isolate of F. proliferatum were not compatible with any isolate in this compatibility group. Our data demonstrate homogeneity of the F.o.d. population in Greece; based on correlations found, VCG and race designation, this population probably consists mainly or entirely of F. oxysporum f.sp. dianthi race 2. |
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