RICE SCIENCE

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Genetic Analysis and Preliminary Mapping of Two Recessive Resistance Genes to Brown Planthopper, Nilaparvata lugens St?l in Rice

  1. 1State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China; 2Shanxi Agricultural University, Taigu 030801, China
  • Online:2011-09-28 Published:2011-10-12
  • Contact: WEI Xing-hua
  • Supported by:

     the Science and Technology Project for Agriculture in China: Conservation, Utilization and Exploration of Agricultural Wild Plant Sources (2010–2014).

Abstract: An F2 population derived from the cross of WB01, an introgression line resistant to brown planthopper (BPH) originated from Oryza rufipogon Griff. and a susceptible indica variety 9311, was developed for genetic analysis and gene mapping. The population with 303 F2:3 families was genotyped by 141 simple sequence repeat (SSR) markers and used for gene mapping. Two softwares, Mapmaker/Exp 3.0 and Windows QTL Cartographer V2.0 were applied to detect QTLs. Totally, two QTLs resistant to BPH, named temporarily as bph22(t) and bph23(t), were identified to locate on chromosomes 4 and 8, individually had LOD values of 2.92 and 3.15, and explained 11.3% and 14 .9% of the phenotypic variation, respectively.

Key words: brown planthopper, Oryza rufipogon, resistance gene, SSR marker, gene mapping