Twenty-two strains of Verticillium dahliae, originally assigned to 15 vegetative compatibility groups (VCGs) using microsclerotial color mutants, were tested for vegetative compatibility using complementary, auxotrophic nitrate-nonutilizing (nit) mutants. Nit mutants were generated from wild-type strains of V. dahliae by selecting chlorate-resistant sectors on cornmeal agar with dextrose amended with potassium chlorate (15-25 g/l). Complementation tests between nit mutants derived from these strains led to the identification of only four distinct VCGs (...)
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Tony R. Joaquim (1990) studied this question.