Development of pyramiding lines for genes conferring multiple resistance to planthopper species in rice.

点击翻译按钮获取中文摘要

The brown planthopper, the whitebacked planthopper, and small planthopper are destructive insect pests in Asia. Two genes conferring resistance to insect pests, derived from GRH- and BPH-resistant rice cultivars have been transferred to both Japonica and Indica genetic backgrounds through marker-assisted selection. These pyramided lines (PYLs) carry both GRH- and BPH-resistance genes in a BPH-susceptible japonica cultivar, Taichung 65 and an Indica cultivar, IR24. In antibiosis testing, the rates of surviving insects and of females with swollen abdomens were lower on the PYLs than on Taichung 65.Virulence-associated QTLs against resistance gene BPH26, were analyzed using the F2 population derived from an avirulent and a virulent strains of BPH. The virulence-associated QTLs were detected on two independent linkage groups. This study constitutes a gateway for future genetic analyses of virulence in BPH.