ỨNG DỤNG CÔNG NGHỆ CHỈ THỊ PHÂN TỬ TRONG CHỌN TẠO GIỐNG LÚA THUẦN KHÁNG RẦY NÂU

Brown planthopper (BPH), Nilaparvata lugens Stal, which causes serious yield reduction by directly sucking the plants and acting as a vector of various diseases such as rice grassy stunt and ragged stunt, is one of the major insect pests of rice throughout the Asian rice growing countries. Marker Assisted Selection (MAS) is a tool for enhancing the efficiency of Rice Molecular Breeding. Introgression of Bph3 and BphZ genes from the rice line IS1.2 into the elite cultivar IR64 was confirmed using MAS. From the BC3F6 generation, the most promissing rice line KR8 was selected. The rice line KR8 was shown high resistance level with most of brown planthopper biotypes in Vietnam. Real revenue yield of the rice line KR8 was 5,2 to 8,0 ton/ha.