Article abstract

Journal of Agricultural and Crop Research

Research Article | Published December 2020 | Volume 8, Issue 12. pp. 305-313.

doi: https://doi.org/10.33495/jacr_v8i12.20.206

 

Breeding for resistance to tomato bacterial wilt: Identification of potential sources of genetic resistance by field evaluation of 28 tomato cultivars in Daloa, Côte d’Ivoire

 



 

 

N’Guessan Olivier Konan1*

Yao Patrice Houphouet1

Ibrahim Konaté2

Saïdou Diallo Mamadou1

Namory Bakayoko1

Adama Ouattara2

Doffou Sélastique Akaffou1

Guy Mergeai3

 

Email Author
Tel: +225 05742598.

 

1. Laboratory of Crop Improvement, Agroforestry Unit, Jean Lorougnon Guédé University, BP 150 Daloa, Côte d’Ivoire.

2. Laboratory of Host-Microorganism-Environment Interactions and Evolution (LIHME), Agroforestry Unit, Jean Lorougnon Guédé University, BP 150 Daloa, Côte d’Ivoire.

3. Laboratory of Tropical Agroecology, Gembloux Agro-Bio Tech, Liège University, 2 passage des Déportés, B-5030 Gembloux, Belgium.


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Citation: Konan NO, Houphouet YP, Konaté I, Mamadou SD, Bakayoko N, Ouattara A, Akaffou DS, Mergeai G (2020). Breeding for resistance to tomato bacterial wilt: Identification of potential sources of genetic resistance by field evaluation of 28 tomato cultivars in Daloa, Côte d’Ivoire. J. Agric. Crop Res. 8(12):305-313. doi: 10.33495/jacr_v8i12.20.206.

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 Abstract 


Bacterial wilt caused by Ralstonia solanacearum is one of the most damaging tomato diseases in the world. The best strategy for controlling this disease is to use genetically resistant tomato plants. In this study, 28 tomato cultivars were evaluated in the field for their resistance to bacterial wilt in Daloa, one of the most important agricultural regions of Côte d'Ivoire. The experiments were carried out during the dry and rainy season and the experimental design was a Randomized Complete Block Design (RCBD) with three replications. The results showed the presence of wilt disease. The streaming test and bacterial culture on growth medium proved the bacterial origin of the wilt symptoms observed. The results of the staining reactions revealed short, straight, rod and Gram negative bacteria similar to R. solanacearum. The severity of the disease was found to be higher in the dry season than in the rainy season. Of 28 cultivars evaluated, 7 cultivars were resistant and did not show any diseased plants during the two study periods. These cultivars constitute interesting sources of resistance for a breeding program aimed at the development of new resistant cultivars adapted to the region of Daloa.

Keywords  Bacterial wilt   Ralstonia solanacearum   resistance   tomato   Solanum lycopersicum   breeding program   

 

 

Copyright © 2020 Author(s) retain the copyright of this article.or(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

 

 

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