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Reaction of different tomato genotypes to the bacterial speck pathogen (pseudomonas syringae pv. tomato)

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Abstract

Genetic tests were carried out in the greenhouse to determine whether resistance to Pseudomonas syringae pv. tomato in the tomato cultivar Ontario 7710 and in the wild accession PI 126430 (Lycopersicon pimpinellifolium) was controlled by different genes. Ontario 7710 (genotype of resistance Pto/Pto), PI 126430, their F! and F2 progenies and F( x susceptible progenies were tested for resistance to the bacterial speck pathogen. No lesions appeared on inoculated leaves in plants of Ontario 7710, PI 126430 and the Fj hybrid. F2 progenies segregated for resistance (symptomless) and susceptibility (50-80 lesions per plant) at a ratio of 15:1. Plants from the cross Fj x susceptible segregated at a ratio of 3 resistant: 1 susceptible. These data indicate that the gene for resistance in PI 126430 is different from that found in Ontario 7710. The gene symbol Pto-2 is proposed for the resistance factor in PI 126430.

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Authors and Affiliations

  1. Dept. of Plant Genetics and Breeding, ARO The Volcani Center, Bet Dagan, Israel

    M. Pilowsky

  2. Dept. of Plant Pathology, ARO The Volcani Center, Bet Dagan, Israel

    D. Zutra

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  1. M. Pilowsky
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  2. D. Zutra
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Pilowsky, M., Zutra, D. Reaction of different tomato genotypes to the bacterial speck pathogen (pseudomonas syringae pv. tomato). Phytoparasitica 14, 39–42 (1986). https://doi.org/10.1007/BF02980476

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  • DOI: https://doi.org/10.1007/BF02980476

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