Abstract:

【Objective】Evaluating the resistance of several new rice lines to Nalaparvata lugens.【Method】Adopting seedling screening test,honeydew measurement during tillering stage,field investigation of Nalaparvata lugens populations and rice yield to evaluate the resistance.【Results】All the six new rice lines including Huhan1A/07WH1462,Chuanxiang29A/07WH644,Chuangxiang29A/07WH1462,Zhong9A/07WH1462,Huhan1A/07WH644 and Zhong9A/07WH644 which had insert Bph14 and Bph15 showed some resistance to brown planthopper.Huhan1A/07WH1462,Chuanxiang29A/07WH644,Chuangxiang29A/07WH1462 had resistance,whill Zhong9A/07WH1462,Huhan1A/07WH644 and Zhong9A/07WH644 had moderate resistance to brown planthopper.The maior cultivar Luohong3A/610234 was susceptible, and Liangyoupeijiu was highly susceptible to brown planthopper.Among these resistant and moderately resistant lines,Zhong9A/07WH1462 had the highest yield,it was 14.8% higher than Liangyoupeijiu.【Conclusion】If manage water and fertilizer in a reasonable way, the line of Zhong9A/07WH1462 could had higher yield.So we could say that Zhong9A/07WH1462 had a brighter prospects.