New sources of resistance to PepMV in tomato

Autores UPV
Revista Journal of Plant Diseases and Protection


Pepino mosaic virus (PepMV) disease causes important losses in tomato (Solanum lycopersicum) yield around the world. In order to find new sources of resistance to this virus, a collection of accessions from different relatives of tomato was screened against PepMV infection. All accessions of S. peruvianum were 100% systemically infected and showed the characteristic disease symptoms. Although some accessions of S. peruvianum contained low concentrations of the virus, the associated symptoms were moderate to severe. In two accessions of S. chilense, some plants with low virus concentration and without symptoms were detected. Accessions of S. lycopersicoides performed best. A variable percentage of plants developed systemic symptoms. All plants of four accessions of S. lycopersicoides, and some selected plants of three more accessions, remained free of PepMV infection. This indicates that S. lycopersicoides is the most promising source of resistance to PepMV and its use in breeding programmes may allow the development of commercial varieties of tomato resistant to PepMV. © Eugen Ulmer KG, Stuttgart.