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The whitebacked planthopper (WBPH), Sogatella furcifera Horváth, is one of the most serious sucking insect pest of ricc e, Oryza sativa L.In this study, Quantitative trait loci (QTLs) for resistance to WBPH, were determined using 131 introgression lines derived from a cross between the recurrent parent IR24 and an accession of Oryza minuta.