引言六十年代,我国育成水稻矮秆良种,促进了水稻大幅度增产。七十年代,杂交水稻的育成,为持续提高水稻单产开辟了新途径。近年来“三系”杂交稻推广面积已扩大到数千万亩,安徽省进行“两系” Introduction Sixty time, our country bred rice dwarf varieties, and promote a substantial increase in rice yield. In the seventies, the development of hybrid rice has opened up a new way for continuous improvement of rice yield. In recent years, the promotion area of ​​“three lines” hybrid rice has been expanded to tens of millions of mu. Anhui Province has conducted “two lines”