Powdery mildew (PM) is one of the most severe foliar diseases in cucumbers (Cucumis sativus L.), but the inheritance of PM resistance remains unclear. The molecular mechanisms underlying PM resistance have been a bottle-neck in the advancement of cucumber cultivars. However, recent findings have provided valuable information on the molecular mechanisms of defense-related genes and signaling pathways. Moreover, several PM resistance genes have been cloned, and their functions have been verified in cucumbers. In this review, we will focus on the inheritance and molecular mechanisms of PM resistance in cucumbers and generalize the known PM resistance genes and signaling pathways. These novel discoveries have advanced the molecular understanding of PM resistance and provide a foundation for the further breeding of resistant cucumber varieties.

中文翻译：

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黄瓜 (Cucumis sativus L.) 抗白粉病的遗传学及抗性机制

白粉病 (PM) 是黄瓜 (Cucumis sativus L.) 最严重的叶面病害之一，但 PM 抗性的遗传仍不清楚。PM抗性的分子机制一直是黄瓜品种进步的瓶颈。然而，最近的发现为防御相关基因和信号通路的分子机制提供了有价值的信息。此外，还克隆了多个抗PM基因，并在黄瓜中验证了其功能。在这篇综述中，我们将重点研究黄瓜抗 PM 的遗传和分子机制，并对已知的 PM 抗性基因和信号通路进行概括。这些新发现促进了对 PM 抗性的分子理解，并为抗性黄瓜品种的进一步选育奠定了基础。