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Nine brown planthopper(BPH) resistance genes have been registered so far, butof them only Bph1, bph2, Bph3, bph4, Bph9, and other three unregisteredgenes Bph10(t), Bph(t), bph(t) were located on chromosome 3, 4, 10, and12, respectively, by using traditional and molecular mapping methods. To usethe genes for BPH resistance in rice breeding and production, interspecific hy-brids between cultivated rice and accessions of O. eichingeri (2n = 24, CC), a
Nine brown planthopper (BPH) resistance genes have been registered so far, but they only Bph1, bph2, Bph3, bph4, Bph9, and the other three unregistered genes Bph10 (t), Bph (t), bph (t) , 4, 10, and 12, respectively, by using traditional and molecular mapping methods. To use the genes for BPH resistance in rice breeding and production, interspecific hy-brids between cultivated rice and accessions of O. eichingeri (2n = 24, a