Summary
Six rice genotypes, differing in partial resistance, were exposed to three isolates of the blast pathogen. Of the variance due to host and pathogen genotypes, 39% was due to host genotype effects, 60% was due to isolate effects, and only 1% was due to host genotype × isolate interactions. Although small, this interaction variance was highly significant and mainly due to the IR50 × W6-1 and IR37704 × JMB8401-1 combinations. Although behaving largely as race-non-specific (large main effects only), the partial resistance cannot be classified as race-non-specific. The results suggest that minor genes for partial resistance operate in a gene for gene relationship with minor genes in the pathogen.
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Roumen, E.C. Small differential interactions for partial resistance in rice cultivars to virulent isolates of the blast pathogen. Euphytica 64, 143–148 (1992). https://doi.org/10.1007/BF00023548
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DOI: https://doi.org/10.1007/BF00023548