Inheritance of Resistance to Cucumber Mosaic Virus Transmission byAphis gossypiiinCucumis melo

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Abstract
Melon (C. melo) line PI 161375 (SC), which is resistant to cucumber mosaic virus (CMV) transmission by A. gossypii, was crossed with 2 susceptible lines to study the inheritance of its resistance. According to the behavior of the F1, F2 and BC1 [back cross] progenies, resistance to CMV transmission by A. gossypii is controlled by 1 dominant gene that appears associated with nonpreference for these plants by A. gossypii. The resistance to CMV transmission by the melon aphid is independent of the resistance to CMV common strains, which is under an oligogenic recessive genetic control. Five melon lines other than ''Songwhan charmi'' (viz, PI [plant introduction] 164320 and PI 414723 from India and ''Ginsen makuwa'', ''Kanro makuwa'' and Shiroubi okayama from Japan) are resistant to CMV transmission by A. gossypii regardless of their resistance or susceptibility to CMV common strains.