一、建立省提、地繁、县制的制种体制,提高亲本纯度前几年我省杂交稻制种均由各区、乡自繁自制,由于制种、繁殖基地分散,技术力量薄弱,隔离条件差,更主要的是父母本长期配组,没有进行提纯复壮,亲本种性退化,混杂严重,纯度很低。经多方调查研究,我省提出了杂交水稻繁殖制种的新体制——省提、地繁、县制。由省种子公司选择技术力量雄厚的原、良种场,统一对繁殖、制种的三 First, the establishment of provincial mention, to the fan, the county system of seed production and improve the purity of the parent A few years ago, hybrid rice seed production in our province by the district, township since the fan-made, due to seed, breeding base dispersed, weak technology, isolation Poor conditions, more important is the parents of long-term with the group, no purification and rejuvenation, the parental degeneration, mixed serious, very low purity. After various investigations and studies, the province proposed a new system of hybrid rice seed production - provincial mention, to Fan, the county system. By the provincial seed companies to choose a strong technical force of the original, thoroughbred field, a unified breeding, seed production of the three