高寒粳稻区由于灌浆成熟期温度不足,即使育出品质好的品种也较难生产出食口性好的大米。针对这一现实情况,在水稻优质高产新品种选育上,丽江市农业科学研究所采取了提高育种材料的抗寒性和早熟性以弥补灌浆成熟期温度的不足,从而选育出食口性好的优质米。具体做法是选择抗寒性极强的育种材料,在熟期上争取育种材料在高寒粳稻最佳温度时段即8月上旬抽穗扬花结束,在9月低秋灌浆结束。通过抗寒性增强和熟期的提早,达到 Alpine japonica rice area due to the lack of temperature during the maturation of grain filling, even breeding good quality varieties are more difficult to produce good taste of rice. In response to this reality, in the selection and breeding of new rice varieties with high quality and high yield, Lijiang Academy of Agricultural Sciences has taken measures to improve the cold resistance and precocity of breeding materials to make up for the lack of temperature during the filling maturation period, Good quality rice. The specific approach is to select the extremely cold hardy breeding materials, in the maturity for breeding materials in the alpine japonica rice optimum temperature period, that is, the beginning of August heading and flowering end, in September autumn filling end. Achieved through increased cold tolerance and earlier maturity