一、引言籼型三系杂交水稻是一个相互联系,相互依存的统一整体。要保证杂交水稻纯度,关键是要做好原种提纯、繁种保纯、制种保纯、经营管理保纯等。而原种提纯,是搞好繁制种保纯的前提和基础。所以从杂交水稻诞生起,我们就围绕着原种提纯,开展了三系亲本的提纯复壮工作,投放了大量的人力、物力和财力,取得了一定成效。但由于杂交水稻推广速度快,一段时期中又忽视了种子质量 I. INTRODUCTION The indica three-line hybrid rice is a unitary one interrelated and interdependent. To ensure the purity of hybrid rice, the key is to do a good job in the original species purification, breeding species of pure, seed pure, management and maintenance of pure and so on. The original species of purification, is to improve the prerequisite and basis for the proliferation of pure species. Therefore, starting from the birth of hybrid rice, we revolved around the original species, carried out the purification and rejuvenation of the three-line parent, put a lot of manpower, material and financial resources, and achieved some success. However, because hybrid rice has been promoted rapidly, the quality of seeds has been neglected for a period of time