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Identification of Three Different Loci Controlling Kasugamycin Resistance in Pyricularia oryzae. M. Taga, Pesticide Research Institute, Kyoto University, Kyoto 606, Japan; H. Nakagawa(2), M. Tsuda(3), and A. Ueyama(4). (2)(3)(4)Pesticide Research Institute, Kyoto University, Kyoto 606, Japan. Phytopathology 69:463-466. Accepted for publication 6 November 1978. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-463.

Two kasugamycin resistant strains of Pyricularia oryzae were obtained in the laboratory from finger millet isolates of the fungus. In each of these strains resistance is controlled by a single gene. Allelism tests, in which a previously studied strain was included, revealed the existence of three loci, kas-1, kas-2, and kas-3, for kasugamycin resistance in P. oryzae. None of these three loci appears to be linked to either of the remaining two or to the mating type. Mutation at the kas-3 locus appears also to be responsible for resistance to blasticidin S.

Additional keywords: rice blast fungus, antifungal antibiotic, fungal genetics, fungicide resistance.