以Ht1A为抗源,不同大斑病(Helminthosporium turcicum pass.)抗性玉米自交系为轮回亲本,用回交方法转育成Ht1近等位基因同型系,以中感自交系配制成不同基因型的杂交组合,并从病斑数、病斑面积和产孢量三个方面研究单基因抗性在生产上的利用可能性。结果表明,中感自交系转入Ht1A基因后,其杂交组合的病斑数目并未减少,而病斑面积及其单位面积产孢量均表现显著减少,证实Ht1A单基因抗性对控制病菌孢量和延缓大斑病害流行有一定实用价值。 Ht1A was used as the resistant source, and different inbred line Maize inbred lines with different leaf blight (Helminthosporium turcicum pass.) Were reincarnated into the Ht1 near-allelic homogenate by backcrossing method. Different genes Type of hybrid combinations, and from the lesion number, lesion area and sporulation in three aspects of single gene resistance in the production of the possibility of use. The results showed that there was no decrease in the number of lesions in the hybrid combinations when the susceptible inbred line was transferred to Ht1A gene, while the lesion area and sporulation per unit area showed a significant decrease. The amount of spores and delay the occurrence of spot blight have some practical value.