Vegetative Compatibility amongVerticillium dahliae Isolates from Watermelon in Greece |
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Authors: | K Elena |
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Institution: | (1) Laboratory of Mycology, Dept. of Phytopathology, Benaki Phytopathological Institute, 145 61 Kifissia, Athens, Greece |
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Abstract: | Vegetative compatibility among 17 isolates ofVerticillium dahliae obtained from watermelon, originating from eight regions of Greece, was investigated using complementation tests between
nitrate-nonutilizing(nit) mutants. Among 529 chlorate-resistant sectors obtained, only 107 werenit mutants. These mutants were paired with tester strains (from Greece and other countries) of previously described vegetative
compatibility groups (VCGs), and also were paired in many combinations among themselves. All isolates were self-compatible.
Sixteen isolates were found to belong to VCG2. Only isolate V75 could not be assigned to a VCG, because the threenit mutants obtained from it showed negative reactions with the tester strains of four VCGs and with complementary mutants from
other isolates. Based on this sample, we conclude that the population ofV. dahliae from watermelon in Greece is homogeneous in respect to VCG. |
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Keywords: | nit mutants VCG Verticillium dahliae Watermelon vegetative compatibility |
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