选用鄂晚８号和加２３等两类晚粳亲本组配成８个正反交Ｆ＿１代，采用剪叶喷液接种法研究了上述材料对白叶枯病Ⅱ、Ⅳ型的抗性反应及其遗传特点。初步结果表明，Ｆ１代的抗级多表现为其父、母本的平均值，且因组合而异；供试材料与菌系之间的反应呈特定的互作关系；其遗传变量指标则依参与亲本或其Ｆ１代的不同而变化。 Two groups of late japonica rice (Oryza sativa L.) on the 8th and the 23rd were selected to make eight reciprocal cross F_1 generations. The resistance of the above materials to type Ⅱ and Ⅳ of bacterial leaf blight was studied by the method of cutting leaf spray inoculation. Its genetic characteristics. The preliminary results showed that the anti-class performance of the F1 generation was mostly the average of its parents and maternal genotypes, and varied according to the combination. The reaction between the tested materials and the strains showed a specific interaction, and the indicators of the genetic variables were Varies depending on the parent or its F1 generation.