笔者从1981年开始,在湖南省科委和省种子公司的资助下,进行了“水稻三系提纯复壮方法的研究”,初步弄清了杂交稻及其 “三系”的混杂退化原因。在分析比较省内外各种提纯复壮方法的基础上,提出了“一选两围保纯法”,现介绍如下。 一、操作规程 “一选两圃”即对不育系进行单株 Starting from 1981, the author studied the purification and rejuvenation of three lines of rice with the help of Hunan Provincial Science and Technology Commission and provincial seed companies, and made a preliminary study of the hybrid degeneration reason of hybrid rice and its “three lines”. On the basis of analyzing and comparing various methods of purification and rejuvenation both inside and outside of the province, this article puts forward the idea of ​​“one selection and two measures of protecting purity”, which are introduced as follows. First, the operating procedures, “a selection of two nurseries” that is, sterile lines of a single plant