Abstract
Pyricularia grisea, the blast fungus of many gramineous plants, includes several host-specific subgroups. A phenogram constructed from rDNA-RFLP data showed that subgroups pathogenic on crops (i.e., rice, foxtail millet, common millet, finger millet, and wheat) and the subgroup pathogenic on crabgrass were classified into different clusters and that this fungal species has a high diversity. The distribution of MAGGY on the phenogram suggested that this rctrotransposon was acquired by a common ancestor of four rDNA types including Oryza isolates (pathogenic on rice) and Setaria isolates (pathogenic on foxtail millet). To elucidate mechanisms of the species-specific parasitism in gramineous crops classified as a subgroup, we crossed a Setaria isolate with a Triticum isolate (pathogenic on wheat and with no MAGGY), and produced an F1 population which (i) showed segregation in pathogenicity, phytotoxic compounds, and MAGGY copies, (ii) included mutants in mycelial color. appressorium formation, pathogenicity, and phytotoxic compounds, and (iii) contained many transposed copies of MAGGY. The usefulness of this population for analyses of the species-specific parasitism was discussed.
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Mayama, S. et al. (1998). Genetical and Physiological Studies on the Species-Specific Parasitism of Magnaporthe Grisea in Gramineous Plants with a Special Reference to a Cross Between the Triticum Isolate and the Setaria Isolate. In: Kohmoto, K., Yoder, O.C. (eds) Molecular Genetics of Host-Specific Toxins in Plant Disease. Developments in Plant Pathology, vol 13. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5218-1_25
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DOI: https://doi.org/10.1007/978-94-011-5218-1_25
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