杂交水稻因具有杂种优势,表现为根系发达、分蘖力强、长势旺盛、物质积累多、穗大粒多而高产。但在杂交水稻种子生产的全过程中,制繁种隔离条件达不到要求,田间去杂保纯工作不及时,父母本种子同晒一个晒场,旧包装物装种子等都将危害种子纯度质量。而使杂交稻种子纯度下降,杂交稻失去杂种优势,导致产量下降。如何保持杂交水稻的杂种优势?关键在于杂交种生产过程中要严格把好种子纯度质量关。 1.把好杂交水稻“三系”亲本种子纯度质量关:不育系、保持系、恢复系种子纯度的好与差直接影响到杂交种的纯度 Hybrid rice because of its heterosis, manifested as well-developed root system, strong tillers, growing strong, more material accumulation, spike large grain and high yield. However, during the whole process of hybrid rice seed production, the isolation and isolation conditions of the hybrid rice can not meet the requirements. In the field, the work of impurity and pure protection is not carried out in time. The seeds of the parents and the sun are dried in the same sun. quality. However, the purity of hybrid rice decreased, and the hybrid rice lost the heterosis, resulting in the decrease of yield. How to maintain the heterosis of hybrid rice? The key lies in the hybrid seed production process to strictly control the purity of the seeds of good quality. 1. Good hybrid rice “three lines ” the purity of the parental seed quality: sterile lines, maintainer lines, restore the purity and purity of the seeds of a direct impact on the purity of hybrids