Mapping of Brown Planthopper Resistance Gene Introgressed from Oryza nivara into Cultivated Rice, O. sativa

Abstract

Brown planthopper (BPH) is one of the most destructive insect pests of rice in Asia. Wild rice species have been shown to be valuable sources for breeding resistant cultivars. In this study, SSR mapping of BPH resistance was conducted using an F10 family derived from a cross between an introgression line, ‘852T034’, from Oryza nivara (Accession number 102165), and a susceptible japonica variety, ‘Tainung 71’. Bulked analysis was used to evaluate the resistance of F10:11 families. A BPH resistant gene contributed by 852T034 was mapped between two flanking SSR markers, RM16655 and RM3317, on the short arm of chromosome 4. This is the first time a BPH resistance gene derived from the wild species O. nivara was mapped. The tightly linked SSR markers will be facilitated marker-assisted breeding and provide the basis for map-based cloning of BPH resistant gene.