DNA markers for mapping. The candidate region of BPH26 was elucidated using
single sequence repeat (SSR) makers reported by the International Rice Genome
Sequencing Project50. Furthermore, newly developed insertion-deletion (InDel) and
single nucleotide polymorphism (SNP) markers in the candidate region were used to
determine regions having a tight linkage to the resistance gene. These new markers
were developed using the direct sequences of both Taichung 65 and ADR52 genomic
DNA. SNP was detected by direct sequencing of the DNA amplified by PCR. The
primers for markers are shown in Supplementary Table S2 online.