近年来,粳稻杂种优势利用在我国有了进展,1979年全国杂交粳稻推广面积已达50余万亩,但与杂交籼稻相比,还觉逊色。其中强优组合的亲本选配是一个突出问题。虽然在这方面已取得了不少经验,如籼粳架桥,利用籼粳优势;采用生态地理远缘,扩大遗传差异;双亲遗传性状互补;双亲中至少有 In recent years, the utilization of heterosis in japonica rice has made some progress in our country. In 1979, the popularization area of ​​japonica hybrid rice in China reached more than 500,000 mu, but compared with hybrid indica rice, it still felt inferior. One of the outstanding problems is the matching of the parents of the gifted patients. Although many experiences have been gained in this area, such as the indica-japonica bridge, the utilization of indica-japonica advantage; the use of eco-geography to extend the genetic differences; the genetic traits of parents are complementary; at least