In order to improve the blast resistance in japonica rice of Heilongjiang province, through marker-assisted selection(MAS),the broad-spectrum blast resistant gene Pigm from Gumei 4(indica) was successfully introgressed into Kongyu 131, Longjing 26 and Kenjiandao 6. Through cross, backcross and self-pollination breeding, 12 lines containing Pigm gene introgression were obtained.Compared with recipient parent, the blast resistant introgression lines were greatly improved, with resistant frequency up to 98.4% ...