Identification and Characterization of Resistance to Tobacco Etch Virus in Lycopersicon Species. R. Legnani, Plant Pathology Station, INRA, Avignon, BP 94, 84143 Montfavet Cedex, France. P. Gognalons, K. Gebre Selassie, and G. Marchoux, Plant Pathology Station, and A. Moretti and H. Laterrot, Vegetable Plant Breeding Station, INRA, Avignon, BP 94, 84143 Montfavet Cedex, France. Plant Dis 80:306. Accepted for publication 7 November 1995. Copyright 1996 The American Phytopathological Society. DOI: 10.1094/PD-80-0306.

Tomato and wild related species with or without described resistance to potyviruses were screened for resistance to tobacco etch virus (TEV). Lycopersicon pennellii LA 716 and L. pimpinellifolium LA 1478 were found to be tolerant to TEV. L. hirsutum PI 247087, previously reported resistant to potato virus Y (PVY), was found resistant to TEV. The virus was not detected by enzyme-linked immunosorbent assay (ELISA) in the inoculated leaves of L. hirsutum PI 247087 but could be recovered by back-inoculations to tobacco plants. TEV was not detected in the uninoculated leaves of L. hirsutum PI 247087. Virus multiplication and/or virus migration from cell to cell appeared to be impaired, preventing systemic spread of TEV in L. hirsutum PI 247087. The resistance of L. hirsutum PI 247087 to TEV is expressed at the coty-ledonary stage and is efficient against four different geographical isolates. Inheritance of the resistance appears to be controlled by one recessive gene