VIEW ARTICLE

Inheritance of Resistance to Melon Mosaic Virus in Cucumbers. S. Cohen, Virologist, Virus Laboratory, The Volcanic Institute of Agricultural Research, Rehovot, Israel; E. Gertman(2), and N. Kedar(3). (2)Graduate Assistant, Virus Laboratory, The Volcani Institute of Agricultural Research, Rehovot, Israel, (3)Associate Professor, The Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, Israel. Phytopathology 61:253-255. Accepted for publication 24 August 1970. DOI: 10.1094/Phyto-61-253.

The cultivar Kyoto 3 feet (K.3.f.) was used as a source of resistance to melon mosaic virus (MMV) in cucumbers. No symptoms were observed in K.3.f. plants following inoculation with MMV. Moreover, virus concentrations were significantly lower in these plants than in susceptible Bet-Alfa (B.A.) cucumbers. Resistance to MMV was classified according to external symptoms, and was found to be governed by a single dominant gene. Modifying factors affect the degree of susceptibility in the absence of the gene for resistance, and possibly also the relative concentration of virus particles in symptomless resistant plants.