Development of Powdery Mildew Resistance in Cucumber Using CRISPR/Cas9-Mediated Mutagenesis of .

Powdery mildew (PM) diseases may severely limit the production of various crops, including members of the family Cucurbitaceae. Successful PM infection relies on the () plant gene family, which encodes susceptibility factors essential for fungus penetration into the host cell. In cucumber (), natural mutations in confer resistance to the PM pathogen .