A Monogenic Dominant Resistance of Tomato to Bacterial Wilt in Hawaii 7996 is Associated with Plant Colonization by Pseudomonas solanacearum |
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| Authors: | V Grimault P Prior G Anaïs |
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| Institution: | INRA Station de pathologie végétale, Laboratoire de Bactériologie, Route de Sanit-CMR, 78026 Versailles Cedex;INRA, Station de Pathologie végétale, de Phytoécologie et de Malherbologie;INRA, Station d'Amélioration des Plantes, BP 1232, 97185 Pointe-à-Piter Cedex, France |
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| Abstract: | Hawaii 7996, a tomato cultivar resistant to bacterial wilt caused by P. solanacearum was crossed with Floradel, a susceptible cultivar and the F1 and F2 seeds were obtained. Inoculated plants were tested in the field for bacterial wilt resistance and colonization by P. solanacearum. The F1 did not wilt and a significant 3:1 segregation for non wilting: wilting was observed in the F2, indicating a monogenic dominant resistance in Hawaii 7996. In the F2 and in Hawaii 7996, resistance was, associated to the limitation of bacterial spread in the stem. The degree of resistance of Floradel, the F2 and Hawaï 7996 was correlated to colonization at midstem. The usefulness of plant colonization criteria for breeding programs is discussed. |
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