Varietal screening of Solanaceae accessions against R. solanacearum strains, agent of bacterial wilt in Côte d’Ivoire

Mohamed Doumbouya Mohamed Doumbouya,Carine Aya N’guessan Carine Aya N’Guessan,Arthur Martin Affery Arthur Martin Affery,Daouda Koné Daouda Koné,Anderson Mohamed Yeo Anderson Mohamed Yeo

doi:10.30574/wjarr.2021.11.2.0384

Mohamed Doumbouya Mohamed Doumbouya, Carine Aya N’guessan Carine Aya N’Guessan + Show 3 more

Open Access

https://doi.org/10.30574/wjarr.2021.11.2.0384

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Abstract

Bacterial wilt caused by R. solanacearum is a constraint that limits the production of solanaceous in Côte d'Ivoire. The genetic control, which is more widely used, comes up against the genetic and phenotypic variability of the strains. The objective of this study was to screen commercial and traditional varieties of Solanaceae against Ivorian strains of different phylotypes to assess their spectrum of resistance to the disease. The level of virulence of the five strains of R. solanacearum was evaluated in semi-controlled conditions against eight varieties of Solanaceae (pepper, eggplant and tomato). Four groups of strains were identified according to the level of virulence. Group 4, composed of strains (RUN 1794 and RUN 1854) of phylotype III and I, respectively, and originating from the localities of Kondoukro and Yamoussoukro, was very virulent. The resistant varieties were for the F1 kalenda eggplant, for the yellow chilli from Burkina and for the F1 Lindo tomato. These varieties could be used in the fight against bacterial wilt in Côte d'Ivoire.

Highlights

Market gardening has long occupied a negligible proportion in farm households in the industrial crop [1]
Classification of bacterial strains of R. solanacearum according to their level of virulence and aggressiveness Analysis of the dendrogram based on final wilt and colonization indices at an aggregation height of about 2.6 distinguished four groups of bacterial strains (Figure 2)
Group 2 is composed of the strain (RUN1743) from Daloa of phylotype I which is characterized by medium virulence affecting varieties of eggplant (KA), tomato (LIN traditional tomato (TDIt), THOR), pepper (TDIp)

Summary

Introduction

Market gardening has long occupied a negligible proportion in farm households in the industrial crop [1]. Market gardening provides producers with a substantial income and constitutes an incomegenerating activity allowing them to meet some basic needs [4]. It is made up of different crops including tomato (Solanum lycopersicum), pepper (Capsicum spp.), eggplant (Solanum melongena), etc. Most produced in the world [5] These vegetables are used almost in all Ivorian dishes [6]. Their production is plagued by many abiotic and biotic constraints, in particular bacterial wilt. Bacterial wilt caused by Ralstonia solanacearum is rife all over the world, mainly in the tropics and [8, 9]. In Côte d'Ivoire, it was observed for the first time in 1984 in plots of eggplant in Adiopodoumé [10] and is found almost in all production areas with a pest which has caused the abandonment of Corresponding author: Carine Aya N’Guessan Départment of plant Biology, Biological Training and Research Unity, Péléforo Gon Coulibaly University, BP 1328 Korhogo, Côte d’Ivoire

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