QTLs for powdery mildew resistance in cucumber identifed using ddRAD-seq

Powdery mildew, caused by Podosphaera xanthii (syn. Sphaerotheca fuliginea ex Fr. Poll.), is one of the most economically important foliar diseases in cucumber (Cucumis sativus L.). Despite the fact that this disease has been affecting cucumbers for many years, it is still not controlled sufficiently in cucumber production. Breeding for powdery mildew resistance is one of the most desirable approaches for controlling this disease. The objective of this study was to conduct a QTL analysis of powdery mildew resistance using double-digest restriction-site-associated DNA sequencing (ddRAD-Seq) analysis and to detect loci associated with powdery mildew resistance. These data will contribute to develop molecular markers to breed new cucumber cultivars.