Abstract:Brown planthopper (BPH) is one of the serious pests in rice production of China.The breeding of rice varieties with resistance against BPH is an effective way to control this pest.Rice line B5 carrying two brown planthopper resistance genes Bph14 and Bph15 was used as donor parent to cross and backcross with recipient parent R1005 with molecular marker-assisted selection.Three lines (CY11711-14,CY11712-5 and CY11714-100) carrying Bph14 and Bph15 genes were bred through identifying the BPH resistance and evaluating main agronomic traits.The results showed that all three bred lines were highly resistant to BPH.The results of evaluating yield,growth duration,main agronomic and quality traits showed that CY11712-5 and CY11714-100 were similar as the recipient parent R1005.Both nine hybrids from crossing three bred lines with the Q2A,Chuannong 1A,Tianfeng A and three bred lines were not resistant angainst BPH,indicating that Bph14 and Bph15 genes did not have the dominant effect in the experiment.