Molecular Mapping of the Blast Resistance Genes Pi2-1 and Pi51(t) in the Durably Resistant Rice ‘Tianjingyeshengdao’

• DOI: 10.1094/phyto-03-12-0042-r
• Publication Date: 2012-07-10T18:32:17Z
• Authors: Yue Wang; Dan Wang; Xiaojuan Deng; Jinling Liu; Pingyong Sun; Yang Liu; Hongmei Huang; Nan Jiang; Houxiang Kang; Yuese Ning; Zhilong Wang; Yinghui Xiao; Xionglun Liu; Erming Liu; Liangying Dai; Guo-Liang Wang
• Keywords: Candidate gene; Molecular marker; Marker-Assisted Selection

Tianjingyeshengdao' (TY) is a rice cultivar with durable resistance to populations of Magnaporthe oryzae (the causal agent blast) in China. To understand the genetic basis its blast, we developed population recombinant inbred lines from cross between TY and highly susceptible 'CO39' for gene mapping analysis. In total, 22 quantitative trait loci (QTLs) controlling blast were identified on chromosomes 1, 3, 4, 5, 6, 9, 11, 12 evaluation four disease parameters both greenhouse nursery conditions. Among these QTLs, 19 contributed by three CO39. Two QTL clusters chromosome 6 named Pi2-1 Pi51(t), respectively. was detected under growth chamber natural conditions, explained 31.24 59.73% phenotypic variation. Pi51(t) only 3.67 10.37% Our results demonstrate that controlled two major seven minor genes. Identification markers linked this study should be useful marker-aided selection breeding programs as well molecular cloning