自50年代以来,曾对国内外一些粳稻品种引进安徽试种,但除引自同纬度一线的中、晚粳外,来自我国北方地区的粳稻或因生育期比原产地缩减过多,或不适应当地早、中稻生育期间的生态条件、稻作制度或生产习惯等原因,均末能直接应用于生产。70年代末,沈阳农业大学稻作室育成了大批籼粳杂交品系,为北粳南引的重新研究提供了丰富的引种资源。由于通过籼粳杂交育成的粳稻品系的遗传背景复杂,且某些重要性状在一定程度上保留了籼稻的遗传基础,因此,通 Since the 1950s, Anhui was introduced to some varieties of japonica rice both at home and abroad. However, except for middle and late japonica rice from the same latitude, japonica rice from the northern part of China may shrink more than its original origin or not Adapting to the local ecological conditions during the early and mid-season rice growth, the rice cropping system or the production habits and other reasons, can not be directly applied to the production. In the late 1970s, a large number of indica-japonica crossbred lines were bred in the Rice Cultivation Lab of Shenyang Agricultural University, which provided abundant introduction resources for the re-study of northern japonica rice. Since the genetic backgrounds of japonica rice lines formed through cross-indica-japonica crossings are complex and certain important traits retain the genetic basis of indica rice to some extent,