Genome-Wide Anlysis of Cucumber Downy Mildew Resistant QTLs

Due to the variation and mutation of the races of Pseudoperonospora cubensis, downy mildew has in recent years become the most devastating leaf disease of cucumber worldwide. Novel resistance to downy mildew (DM) has been identified in the breeding lines of Cucumis species of Korea. After the successful hybridization between breeding lines of cucumber (C. sativus L.), a mapping population for QTL mapping of downy mildew resistance has been generated. We used classical QTL mapping and GBS(genotype-based sequencing) –based mapping , to find the gene(s) responsible for downy mildew resistance in cucumber. In this meeting, we present the current result of Downy mildew resistance QTL mapping