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我国云南、新疆、辽宁、北京等省(区)、市的农业科研单位,开展社会主义大协作、实行专业队伍与群众运动相结合,进行杂交粳稻“三系”选育的科学实验活动,通过突破人工制造恢复系,实现“三系”配套,并选育出一批具有明显杂交优势的组合,在各地扩大试种,一般亩产千斤左右,比当地良种增产2成以上。1977年试种杂交粳稻约2,000余亩。1978年
China’s agricultural research institutes in provinces (autonomous regions and municipalities) in Yunnan, Xinjiang, Liaoning and Beijing conducted a large-scale socialist collaboration to implement a scientific experimental program of breeding “three lines” of japonica hybrids through a combination of specialized teams and mass movements. Break through the man-made recovery system, to achieve “three lines” package, and bred a group of hybrids with obvious advantages in all parts of the expansion of trial planting, generally about a kilogram of per mu, than the local varieties increased by more than 2 percent. 1977 hybrid rice planted about 2,000 acres. 1978