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Resistance

Inheritance of Resistance to Cucumber Mosaic Virus Transmission by Aphis gossypii in Cucumis melo. M. Pitrat, Chargés de Recherches, Station d’Amélioration des Plantes Maraîchères and Station de Pathologie Végétale, Domaine Saint Maurice 84140 – MONTFAVET, France; H. Lecoq, Chargés de Recherches, Station d’Amélioration des Plantes Maraîchères and Station de Pathologie Végétale, Domaine Saint Maurice 84140 – MONTFAVET, France. Phytopathology 70:958-961. Accepted for publication 26 March 1980. Copyright 1980 The American Phytopathological Society. DOI: 10.1094/Phyto-70-958.

Melon (Cucumis melo) line PI 161375 (SC), which is resistant to cucumber mosaic virus (CMV) transmission by Aphis gossypii, was crossed with two susceptible lines to study the inheritance of its resistance. According to the behavior of the F₁, F₂, and BC₁ progenies, resistance to CMV transmission by A. gossypii is controlled by one dominant gene that appears to be 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. The study of a varietal collection has shown that five melon lines other than SC (viz. PI 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.