Evolution of the rice blast pathogen on spatially structured rice landraces maintains multiple generalist fungal lineages

Ali Sajid, Gladieux Pierre, Ravel Sébastien, Adreit Henri, Meusnier Isabelle, Milazzo Joëlle, Cros-Arteil Sandrine, Bonnot François, Jin Baihui, Dumartinet Thomas, Charriat Florian, Lassagne Alexandre, He Xiahong, Tharreau Didier, Huang Huichuan, Morel Jean-Benoit, Fournier Elisabeth. 2023. Evolution of the rice blast pathogen on spatially structured rice landraces maintains multiple generalist fungal lineages. Molecular Ecology, 32 (10), n.spéc. Evolutionary ecology of human associated microbes : 2519-2533.

Url - jeu de données - Entrepôt autre : https://www.ebi.ac.uk/ena/browser/view/PRJEB54887 / Url - jeu de données - Entrepôt autre : https://www.ebi.ac.uk/ena/browser/view/PRJEB54888

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Traditional agrosystems, where humans, crops and microbes have coevolved over long periods, can serve as models to understand the ecoevolutionary determinants of disease dynamics and help the engineering of durably resistant agrosystems. Here, we investigated the genetic and phenotypic relationship between rice (Oryza sativa) landraces and their rice blast pathogen (Pyricularia oryzae) in the traditional Yuanyang terraces of flooded rice paddies in China, where rice landraces have been grown and bred over centuries without significant disease outbreaks. Analyses of genetic subdivision revealed that indica rice plants clustered according to landrace names. Three new diverse lineages of rice blast specific to the Yuanyang terraces coexisted with lineages previously detected at the worldwide scale. Population subdivision in the pathogen population did not mirror pattern of population subdivision in the host. Measuring the pathogenicity of rice blast isolates on landraces revealed generalist life history traits. Our results suggest that the implementation of disease control strategies based on the emergence or maintenance of a generalist lifestyle in pathogens may sustainably reduce the burden of disease in crops.

Mots-clés Agrovoc : pyriculariose du riz, Pyricularia oryzae, génétique des populations, agent pathogène, variété, lignée, race indigène, Oryza sativa, maladie des plantes, pathologie végétale

Mots-clés géographiques Agrovoc : Chine, Yunnan

Mots-clés libres : Intraspecific cultivated diversity, Landraces, Oryza sativa, Phenotype–genotype associations, Population genomics, Pyricularia oryzae, Rice blast, Traditional farming

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement hors UE : AgreenSkills, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université Pierre et Marie Curie

Auteurs et affiliations

• Ali Sajid, Université de Montpellier (FRA) - auteur correspondant
• Gladieux Pierre, INRAE (FRA)
• Ravel Sébastien, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0001-6663-782X
• Adreit Henri, CIRAD-BIOS-UMR PHIM (FRA)
• Meusnier Isabelle, INRAE (FRA)
• Milazzo Joëlle, Université de Montpellier (FRA)
• Cros-Arteil Sandrine, INRAE (FRA)
• Bonnot François, Université de Montpellier (FRA)
• Jin Baihui, Kunming University (CHN)
• Dumartinet Thomas, Université de Montpellier (FRA)
• Charriat Florian, CIRAD-BIOS-UMR ASTRE (FRA)
• Lassagne Alexandre, CIRAD-BIOS-UMR PHIM (FRA)
• He Xiahong, Southwest Forestry University (CHN)
• Tharreau Didier, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0003-3961-6120
• Huang Huichuan, Yunnan Agricultural University (CHN)
• Morel Jean-Benoit, INRAE (FRA)
• Fournier Elisabeth, INRAE (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/604269/)

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