我们从1970年开始,进行籼粳稻杂交育种的研究,目的是从国内外籼稻品种中,引进抗性和矮秆丰产遗传基因,先提高抗性;其次逐步稳定籼粳交杂种优势,在矮秆、大穗、大粒等丰产类型上有所突破;第三在育种实践的基础上,探讨籼粳亚种间杂交育种的遗传规律,以指导这一育种新途径的应用。 Starting from 1970, we studied the cross breeding between indica and japonica. The purpose was to introduce resistance and dwarf high-yielding inheritance genes from domestic and foreign indica varieties first and then to improve the resistance. Secondly, to gradually stabilize the hybrid indica-japonica hybrids, , Big spike, big grain and other high yield types; thirdly, on the basis of breeding practice, the genetic rules of crossbreeding between indica and japonica subspecies were explored to guide the application of this new breeding approach.