全国杂交水稻育种攻关,经“六五”期间协作,已育成了一此新的组合,在局部地区推广种植,取得了一定的经济效益和社会效益。但到目前为止,我国南方各省(区)试验鉴定和生产示范的杂交早稻新组合,在长江流域内,还没有一个熟期与原丰早、广陆矮4号相同的高产、优质、多抗的早、中熟组合。杂交早稻“早而不优、优而不早”仍然是长江流域没有解决的问题,因此,国家 National hybrid rice breeding research, after “six five” during the collaboration, has developed a new combination of this part of the promotion of planting in some areas, and achieved some economic and social benefits. However, so far, no new combination of early indica hybrid rice for experimental identification and production demonstration in the southern provinces (regions) of China has yet the same high-yielding, high-quality, multi-resistance The early, medium-cooked combination. Early hybrid rice “early but not superior, excellent and early” is still an unsolved problem in the Yangtze River, therefore, the country