PAIX

PAthogen-Informed sustainable resistance of cassava against Xanthomonas

Cassava bacterial blight (CBB) is a disease caused by the gram-negative bacteria Xanthomonas axonopodis pv. manihotis (Xam). Xam populations show a high diversity in Colombia. However, no systematic studies have been conducted in other parts of the world.

Objectifs

The main goal of the project is to establish new locally-adapted CBB control strategies in three different areas of the world where severe epidemics occur or are emerging

Actions

  1. Survey in Latin America, West-Africa and South-East Asia.
  2. Molecular characterization of Xam using VNTRs.
  3. Characterization of TAL repertoires of most prevalent Xam strains.
  4. Search for defective S susceptibility and resistance (executor) R genes in the cassava germplasm 5) Participatory research with farmer organizations.
  5. Pan-tropical CBB survey network.

Résultats

  • Sampling and molecular characterization of Xam strains from Latin America, West-Africa and South-East Asia,
  • Xam core collection representative of the pathogen population diversity,
  • Functional diversity of the TALome of most prevalent Xam strains,
  • Identification of cassava susceptibility (S) genes and loss of function alleles,
  • Identification of executor resistance gene candidates,
  • Knowledge on the impact of agricultural practices on the incidence of CBB,
  • Training of next-generation scientists/technicians to CBB survey & diagnosis,
  • A unified pan-tropical network on cassava diseases
  • Appel à projet :
  • Date de démarage :
    1er février 2015
  • Date de clôture :
    1er février 2018
  • Projet étendard :
    oui
  • Responsable
    Boris Szurek
  • boris.szurek@ird.fr
  • Etablissement
  • Unités de recherche du réseau