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８种不同胞质类型的不育系及其保持系与９个恢复系按Ｐ×Ｑ交配设计分别配制不育系杂种 和保持系杂种，接种白叶枯病（Ｘｏｏ）“强”致病力菌系ＺＨＥ－１７３和“弱”致病力菌系ＫＳ－６－６，研究杂交稻 抗白叶枯病的遗传机制。结果表明：（１）不育系或保持系、恢复系以及不育系或保持系与恢复系间的 互作对不育系杂种或保持系杂种抗性的影响均达到极显著水平；（２）不育系杂种或保持系杂种与其不 育系、保持系及中亲值的抗性相关均达到显著或极显著水平；（３）杂交稻抗性相对优势受亲本配组类 型影响，存在正、负向部分显性和正、负向超显性，但以正向部分显性为主；（４）杂交稻抗性由核基因 控制而与胞质基因无关。说明提高杂交稻抗性水平和抗性持久性的关键是向“三系”同步转移抗性强、 抗谱广、配组表现稳定的显性或隐性主效抗病基因以及累加微效抗病基因。
Eight different cytoplasmic male sterile lines and their maintainer lines and nine restorer lines were designed according to the P × Q mating design to prepare male sterile and maintainer hybrids respectively and inoculated with Xoo “virulent” virulence The strain ZHE-173 and the “weak” virulent strain KS-6-6 were used to study the genetic mechanism of bacterial blight resistance in hybrid rice. The results showed that: (1) The effects of male sterile line or maintainer line, restorer line and male sterile line or maintainer line and restorer line on the hybrid resistance or maintainer hybrid resistance all reached the extremely significant level; (2) (3) The relative superiority of resistance in hybrid rice was affected by the type of parental group, and there were positive, negative, positive, Negative part dominant and positive and negative super dominant, but dominated by dominant part; (4) The resistance of hybrid rice is controlled by the nuclear gene but not by the cytoplasmic gene. The key to improve the resistance level and resistance persistence of hybrid rice is to synchronously transfer the dominant or recessive major resistance genes with stable resistance and wide spectrum of resistance to the “three lines” Disease genes.