Abstract: In order to accelerate molecular marker assisted breeding process of powdery mildew resistance in cucumber（Cucumis sativus L.）, in this paper, high susceptible cucumber inbred line M12, abd high resistant inbred line M3 to powdery mildew were taken as parent and their hybrid, F2 populations and BC1 populations were used as experimental materials. We identified the seedlings inoculated with powdery mildew fungus and probed into the genetic regulation of powdery mildew resistance in cucumber. Combing with BSA method and SSR technology, SSR markers linked to the major resistant gene of powdery mildew in cucumber was obtained. The results showed that the resistance to powdery mildew was mainly controlled by a single recessive gene. By analyzing F2 single plant with SSR technique, a marker SSR15592 linked to the resistant gene was identified. The genetic distance between this marker and resistant gene was 7.62 cM.

Key words: Cucumber, Powdery mildew, Resistant gene, Genetic analysis, SSR

摘要： 以黄瓜高感、高抗白粉病自交系M12、M3为亲本组合得到的F2群体和BC1群体为试材，采用苗期接种鉴定，探讨了黄瓜白粉病抗性的遗传规律；结合BSA法和SSR技术，获得了与黄瓜白粉病抗性主效基因连锁的SSR标记。结果表明，供试亲本间白粉病抗性主要受一隐性单基因控制。对F2单株进行SSR分析，鉴定出1个与黄瓜白粉病抗性基因连锁的标记SSR15592，该标记与抗性基因间的遗传距离为7.62 cM。

关键词: 黄瓜, 白粉病, 抗性基因, 遗传分析, SSR