Breeding of melon [Cucumis melo] rootstock cultivars resistant to Fusarium oxysporum f.sp. melonis race 1,2y

Two new rootstock cultivars of melon (Cucumis melo L.) resistant to race 1,2y of Fusarium oxysporum f. sp. melonis were released. 'Dodai No.1' was selected from a cross between 'Melon Parental Line 1' ((C. melo var. reticulatus Naud. x C. melo var. makuwa Makino) x C. melo var. reticulatus Naud.) and 'Tokyo-wase (maruba)' (C. melo L. var. conomon). 'Dodai No.1' showed remarkable quantitative resistance to race 1,2y, moderate quantitative resistance to race 2 and true resistance to race 0 and race 1. The Fsub(1) cultivar 'Dodai No.2' was developed as a hybrid of two melon cultivars, 'Barnett Hill Favorite' and 'Dodai No.1'. 'Dodai No.2' showed moderate resistance to race 1,2y, true resistance to race 0, race 1 and race 2. Both cultivars can be effectively used as rootstock to control Fusarium wilt in melon fields infested by race 1,2y in Hokkaido.