四川农业大学水稻研究室,于1972年运用地理远缘材料开展籼稻品种间杂交培育水稻雄性不育系的研究。1974、1975年相继实现三系配套,1977年利用籼粳中间材料从事人工制保。在此之前,我们分析了直接利用籼不粳恢或粳不籼恢不易突破杂种结实率低等难题,同时考虑到四川人们喜爱吃籼 Sichuan Agricultural University Rice Research Laboratory, in 1972 using geographic distant materials to carry out indica rice cross breeding of male sterile lines. In 1974, 1975, three series of matching have been achieved in succession, in 1977 the use of intermediate materials in indica and japonica in artificial security system. Prior to this, we analyzed the direct use of indica japonica rice restore or japonica indica recovery difficult to break the hybrid seed setting rate low, taking into account the Sichuan people like to eat indica