[Objective] The research aimed to map QTL for the sensitivity of the traits related outcrosssing of Japonica rice to exogenous GA3 and provide theoretical basis for breeding and improving the high-sensitivity sterile line.[Method] Taking Japonica rice Xiushui 79 and C bao and their recombinant inbred line population 260 lines as test materials,the sensitivity of 4 traits related outcrossing to Exogenous GA3 and their QTL mapping were studied by using composite interval mapping..[Result]Three QTLs,which cont...