Genetics of Resistance to Fusarium oxysporum f. sp. melonis Races 0 and 2 in Muskmelon Cultivars Honey Dew, Iroquois, and Delicious 51. F. W. Zink, Plant Breeder Emeritus, Department of Vegetable Crops, University of California, Davis 95616. . Plant Dis. 76:162-166. Accepted for publication 22 August 1991. Copyright 1992 The American Phytopathological Society. DOI: 10.1094/PD-76-0162.

In artificial inoculation studies, muskmelon (Cucumis melo) cultivars Honey Dew, Iroquois, and Delicious 51 were resistant to races 0 and 2 but susceptible to races 1 and 1-2 of Fusarium oxysporum f. sp. melonis. Segregation ratios of F₁, F₂, and BC₁ populations of crosses between resistant Honey Dew, Iroquois, and Delicious 51 and susceptible Top Mark indicated that resistance to races 0 and 2 of Fusarium wilt is conferred by a single dominant gene. In allelism tests, resistance was determined to be controlled by the gene (Fom 1) or an allele of this gene.