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The fungal pathogen causes blast, a severe disease of rice ( L.). Improving blast resistance is important in rice breeding programs. Inoculation tests have been used to select for resistance genotypes, with DNA marker-based selection becoming an efficient alternative. No comprehensive DNA marker system for race-specific resistance alleles in the Japanese rice breeding program has been developed because some loci contain multiple resistance alleles. Here, we used the Fluidigm SNP genotyping platform to determine a set of 96 single nucleotide polymorphism (SNP) markers for 10 loci with race-specific resistance. The markers were then used to evaluate the presence or absence of 24 resistance alleles in 369 cultivars; results were 93.5% consistent with reported inoculation test-based genotypes in varieties. The evaluation system was successfully applied to high-yield varieties with genetic backgrounds. The system includes polymorphisms that distinguish the resistant alleles at the tightly linked and loci, thereby confirming that all the tested cultivars with allele carry allele. We also developed and validated insertion/deletion (InDel) markers for ten resistance loci. Combining SNP and InDel markers is an accurate and efficient strategy for selection for race-specific resistance to blast in breeding programs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6507720 | PMC |
| http://dx.doi.org/10.1270/jsbbs.18143 | DOI Listing |
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