Genetics of the cotton wilt causal agent verticillium dahliae 1. genetic marking of physiologic races of verticillium dahliae

Kas'yanenko, A.G.; Portenko, L.G.

Genetika 15(5): 812-822

1979


ISSN/ISBN: 0016-6758
Accession: 005519251

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Abstract
N-methyl-N-nitrosourea, UV irradiation and .gamma.-irradiation were used to induce different mutations in the strains of physiological races 1 and 2 of V. dahliae. A number of morphological, pigment, auxotrophic and Benlate-resistant mutants with stable, well-expressed mutant characters were obtained. Some of mutants caused wilt of the same cultivars that the original strain did, but there was a great difference in wilt severity between plants inoculated with di-ferent mutants. Correlation between virulence and any morphological trait was not observed except dwarf forms, most of which were avirulent. The mutants causing severe wilt of certain cultivars of cotton are suitable markers for genetic studies of virulence.