Breeding and characterization of the world's first practical rice variety with resistance to brown spot () bred using marker-assisted selection.

Brown spot (BS) caused by is a serious disease of rice and decreases grain yield. Breeding for BS resistance is an economical solution but has not hitherto been achieved. To develop a practical BS-resistant variety, we introduced a chromosomal segment including a quantitative trait locus (QTL) for BS resistance, , derived from the BS-resistant local resource 'Tadukan', into the genetic background of the high-yielding but susceptible 'Mienoyume'.

Identification of QTLs for rice brown spot resistance in backcross inbred lines derived from a cross between Koshihikari and CH45.

Rice brown spot (BS), caused by , is one of the major diseases of rice in Japan. Quantitative resistance has been observed in local cultivars (e.g.