在我国的作物育种史上,最令人瞩目的当推水稻杂交研究。自1976～1993年,全国累计推广杂交水稻24亿亩,增产稻谷2400亿公斤,增产额相当于近年来我国粮食年总产量的50％左右。这是作物育种史上的奇迹。水稻杂交育种,从方法上说,分为三系法、二系法和一系法。且随着研究的不断深入,三种方法的依次发展是育种程序越来越简化,育种效率越高。 In China’s history of crop breeding, the most remarkable when pushing the hybrid rice research. From 1976 to 1993, a total of 2.4 billion mu of hybrid rice was popularized throughout the country, increasing paddy output by 240 billion kilograms. The yield increase is equivalent to about 50% of the total grain output of our country in recent years. This is a miracle in the history of crop breeding. Rice hybrid breeding, from the method that is divided into three lines, two lines and a series of law. With the deepening of research, the sequential development of the three methods is that the breeding program is simplified and the breeding efficiency is higher.