Evaluation of Resistance to Race 3, Biovar 2 of Ralstonia solanacearum in Tomato Germplasm

Carmeille, A and Prior, P and Kodja, H and et al, . (2006) Evaluation of Resistance to Race 3, Biovar 2 of Ralstonia solanacearum in Tomato Germplasm. Journal of Phytopathology, 154 (7/8). pp. 398-402.

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Sources of resistance to tropical race 1 strains of Ralstonia solanacearum, the causative agent of bacterial wilt, have been identified in the tomato germplasm. Till now, no experimental data are available on Lycopersicon spp. (now Solanum spp.) sources for resistance to temperate race 3, biovar 2 strains. Eighty-two accessions belonging to different Lycopersicon spp. were evaluated for resistance to a race 3 strain endemic to Réunion Island. Evaluation was conducted in growth chambers, and included the Lycopersicon esculentum cv. Roma as susceptible control. No immunity or complete resistance was observed in any accession tested under our experimental conditions. Therefore, race 3 strain was demonstrated to be highly pathogenic on all the Lycopersicon accessions tested. Partial resistance was significantly detected in only one accession belonging to the species Lycopersicon peruvianum, and one L. esculentum var. cerasiforme tomato line. Five other genotypes from the species L. esculentum, Lycopersicon hirsutum and L. peruvianum were noteworthy. The Hawaii 7996 line represented the best source of partial resistance to race 3 with 52% of wilting. It can therefore be used as a starting point for introducing resistance to bacterial wilt caused by R. solanacearum race 3 in tomato and studying its genetic control.

Item Type: Article
Additional Information: We thank Carole Caranta (INRA, Montfavet, France) for critically reviewing the manuscript; and Carole Caranta and Georges Ano (INRA, Guadeloupe, FWI) for supplying seed material.
Uncontrolled Keywords: bacterial wilt;Ralstonia solanacearum;disease resistance;tomato;Lycopersicon (now Solanum)
Author Affiliation: Peuplements végétaux et bioagresseurs en milieu tropical’ Université de La Réunion-CIRAD, 15 avenue René Cassin, BP 7151, 97715 Saint Denis messag cedex 9, La Réunion, France; 2INRA, Unité de Pathologie Végétale, Domaine St Maurice, BP 94, 84143
Subjects: Plant Protection > Control Methods
Divisions: Other Crops
Depositing User: Mr Siva Shankar
Date Deposited: 17 Apr 2012 03:32
Last Modified: 17 Apr 2012 03:32
Official URL: http://dx.doi.org/10.1111/j.1439-0434.2006.01112.x
URI: http://eprints.icrisat.ac.in/id/eprint/4753

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