【摘要】 通过对近30年来江苏省育成的45个迟熟中粳品种的区域试验资料分析和种植鉴定,了解江苏迟熟中粳品种的育种状况,为新品种选育提供参考依据。区试资料分析表明,江苏近30年来迟熟中粳品种产量连上3个台阶,代表品种为1983年审定的盐粳2号,产量达到500kg/667m2;1992年审定的武育粳3号,产量达到580kg/667m2;1999年审定的武运粳8号,产量达到650kg/667m2。2005年以后育成的品种产量徘徊在600kg/667m2。2012年扬州种植鉴定结果表明,不同时期育成的品种产量为500~600kg/667m2,产量提升不明显。近年来注重品种的外观品质改良,垩白粒率有明显改进,但垩白度和食味品质的改良仍需要加强。更多还原

【Abstract】 In order to understand the breeding situation and trend of the late-maturity medium japonica rice varieties in Jiangsu Province,the regional trial data and yield and quality of forty-five late-maturity medium japonica rice varieties released in last thirty years were analyzed,which would provide a reference frame for the improvement and breeding of new varieties.The regional trial data showed that there were three development phases of yield of the late-maturity medium japonica rice varieties and the representative varieties were Yanjing 2with yield of over 500kg/667m2 bred in1983,Wuyujing 3with yield of over 580kg/667m2 bred in 1992,Wuyunjing 8with yield of over 650kg/667m2 bred in1999,respectively.Yield of varieties bred after 2005was fluctuated around 600kg/667m2.Yield and quality of fortyfive late-maturity medium japonica rice varieties identified at Yangzhou in 2012showed that 1)yield of varieties bred in different periods was all fluctuated from 500kg/667m2 to 600kg/667m2 and had not been developed significantly,2)chalky grains of varieties had been improved significantly,but chalkiness and taste quality of varieties were still needed to be improved.更多还原