The whitebacked planthopper (WBPH), Sogatella furcifera (Horvath), is a serious insect pest that causes severe yield losses in rice-growing areas in tropical Asia. Through classical genetic analysis, six major genes conferring resistance to WBPH have been discovered in rice germplasm: Wbph1, Wbph2, Wbph3, wbph4, Wbph5 (Khush and Brar 1991), and Wbph6(t) (Ma et al 2001). Using molecular markers, Wbph1 and Wbph6(t) have been located in linkage groups 7 (McCouch 1990) and 11 (Ma et al 2001), respectively. In addition to these major genes, quantitative trait loci (QTLs) associated with quantitative resistance to WBPH have also been mapped across rice mapping populations. A major QTL for tolerance for WBPH was mapped on linkage group 11 in a doubled-haploid (DH) mapping population derived from IR64/Azucena (Kadirvel et al 1999). A major QTL for antibiosis based on ovicidal response was detected on linkage group 8 in a recombinant inbred population (RIL) derived from Asominori/ IR24 (Yamasaki et al 1999). Two more QTLs for ovicidal response of WBPH were detected in a DH population derived from Zaiyeging 8/Zing 17 (Sogawa et al 2001). The search for QTLs conferring resistance to WBPH across mapping populations would help breeding programs develop cultivars with durable resistance to WBPH. Here we report our attempt to detect simple sequence repeat (SSR) markers associated with quantitative resistance to WBPH involving an F3 population derived from a cross between Basmati 370 and ASD16.