Screening Wild Tomatoes for Resistance to Bacterial Speck Pathogen (Pseudomonas tomato). M. Pilowsky, Division of Plant Genetics and Breeding, Agricultural Research Organization, the Volcani Center, Bet Dagan 50-250, Israel. D. Zutra, Division of Plant Pathology, Agricultural Research Organization, the Volcani Center, Bet Dagan 50-250, Israel. Plant Dis. 66:46-47. Accepted for publication 16 April 1981. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-46.

Plants of 19 wild Lycopersicon accessions were tested in the greenhouse for resistance to Pseudomonas tomato, which causes bacterial speck. Plants of L. pimpinellifolium (PI 126430), L. peruvianum (PI 128643 and 128650), and L. hirsutum f. glabratum (PI 134417 and 134418) remained symptomless. Individual plants of L. pimpinellifolium (PI 126433, 126925, and 126939) and L. peruvianum (PI 126946 and 128652) also showed a high level of resistance to the pathogen. Genetic studies indicated that resistance of L. pimpinellifolium in accession PI 126430 to P. tomato was dominant and conditioned by a single gene.

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