杂交水稻的大面积推广,为促进我国粮食增产作出了积极的贡献。但是,随着三系亲本世代的提高,由于育性和恢复力的分离与退化,因而削弱了杂种优势的发挥。因此,切实搞好三系亲本的提纯复壮,已引起各地农业部门和科研单位的重视。现行水稻三系提纯复壮的方法,一般自初选优株扩大为群体,都需要经过四、五代的成对配交和小区隔离,因此,技术性强,程序较繁,周期较长,成本较高。近来我们采用组织培养技术,通过诱导培养成再 The large-scale popularization of hybrid rice has made a positive contribution to the promotion of grain output in our country. However, with the improvement of the three generations of parents, the heterosis is weakened due to the separation and degradation of fertility and resilience. Therefore, to do a good job of purifying and rejuvenating the three-line parents has drawn the attention of the agricultural departments and scientific research units all over the country. The current three lines of rice purification and rejuvenation methods, generally since the first selection of superior strains expanded to groups, need to go through four or five generations of paired with the community and district isolation, therefore, strong technical, complex procedures, longer cycle, higher cost . Recently we have used tissue culture techniques to induce re-cultivation