CUCUMBER MOSAIC VIRUS RESISTANCE IN TRANSGENIC SAN MARZANO TOMATOES
Cucumber mosaic virus (CMV) has been the causative agent of a severe disease in Southern Italy since 1987. The research for natural resistance sources in Lycopersicon spp, is still under way. We have transformed San Marzano tomato lines with a chimeric gene whose transcript is the benign satellite RNA named Ra. Massive production of satellite and attenuation of symptoms have been observed in transformed plants infected with a satellite-free CMV strain. Transformed plants were also tested for agronomical traits in a contained (aphid-proof) environment: preliminary results show that transgenic tomatoes have higher yields than control plants in presence of the infection, and that qualitative determinants are unchanged following the Agrobacterium-mediated genetic transformation.
Valanzuolo, S., Catello, S., Colombo, M., Dani, M., Monti, M.M., Uncini, L., Petrone, P. and Spigno, P. (1994). CUCUMBER MOSAIC VIRUS RESISTANCE IN TRANSGENIC SAN MARZANO TOMATOES. Acta Hortic. 376, 377-386