Breeding of Resistance to Brown Planthopper (Nilaparvata lugens ) in Indica Hybrid Rice

The characters of resistance to brown planthopper (Nilaparvata lugens ) of 80 restorers in indica hybrid ricewere evaluated. It was found that 30 restorers express medium- or higher-grade resistance. Twelve of them show super toASD7 in durable resistance. These materials, 0- 3 degree of resistant grade and durable resistance7d, were divided intofirst degree of resistant materials. After testing heterosis, assessing apparent rice quality, evaluating resistance to rice leafblight and rice blast, two new restorers were selected. One restorer, Aihong/Tai 1059, expressed medium grade of resistanceto rice leaf blight and rice blast and brown planthopper. The yield of its hybrid with Xieqingzao A increased 12. 9% than thatof CK Shanyou 10. Another, LS-2/Milyang 46, possessed such characteristics as high resistance to brown planthopper andrice blight, medium resistance to rice leaf blight, and excellent apparent rice quality.