The culm length, panicle length, spikelets per panicle and panicle exsertion were evaluated by using F2:3 populationincluding 200 lines derived from the cross of indica and japonica Milyang 23/Jileng 1 under five different environments ofBeijing (natural normal growing environment), Kunming (natural cold environment), Gongzhuling of China (cold waterirrigation) and Chuncheon of Korea (natural normal growing environment and cold water irrigation), and QTLs of thesetraits were analyzed by using SSR markers. The results showed that 44 QTLs related to these agronomic traits weredetected under five different growing environments, and these QTLs have been located on 11 chromosomes exceptchromosome 9. The QTLs for qCL1a, qCL1b, qCL5a, qCL6b, qPL1a, qPL3a, qPL6b, qPL6c, qPL7b, qSP8b, qSP1c,qSP11a, qSP12, and qPE1 have been detected under more than two growing environments, and those that were littleaffected by environments, were stable QTLs. Among them, qCL1a, qCL1b, qPL1a, qSP1c, and qPE1 explained 24.2-55.2%,22.7-39.9%, 12.5-27.7%, 14.4-33.5%, and 26.6-28.7% of observed phynotypic variation, respectively, which were majorgenes mainly appearing as overdominance. These QTLs cause the increase in action to culm length, panicle length,spikelets per panicle, and panicle exsertion under cold environment, showing that these QTLs were correlated with coldtolerance. The culm length, panicle length, spikelets per panicle and panicle exsertion were evaluated by using F2: 3 populationincluding 200 lines derived from the cross of indica and japonica Milyang 23 / Jileng 1 under five different environments ofBeijing (normal normal growing environment), Kunming ( natural cold environment), Gongzhuling of China (cold waterirrigation) and Chuncheon of Korea (natural normal growing environment and cold water irrigation), and QTLs of these traits were analyzed by using SSR markers. The results showed that 44 QTLs related to these agronomic traits weredetected under five different growing environments, and these QTLs have been located on the 11 chromosomes except chromosome 9. The QTLs for qCL1a, qCL1b, qCL5a, qCL6b, qPL1a, qPL3a, qPL6b, qPL6c, qPL7b, qSP8b, qSP1c, qSP11a, qSP12, and qPE1 have been detected under more than two growing environments, and those that were little affected by environments, were stable QTLs. Among them, qCL1a, qCL1b, qPL1a, qSP1c, and qPE1 exp lained 24.2-55.2%, 22.7-39.9%, 12.5-27.7%, 14.4-33.5%, and 26.6-28.7% of observed phynotypic variation, respectively, were were major appearing as overdominance. These QTLs cause the increase in action to culm length, panicle length, spikelets per panicle, and panicle exsertion under cold environment, that those QTLs were correlated with coldtolerance.