Complex adaptive architecture of quantitative resistance erosion in a plant fungal pathogen

Dumartinet Thomas, Ravel Sébastien, Roussel Véronique, Perez-Vicente Luis, Aguayo Jaime, Abadie Catherine, Carlier Jean. 2022. Complex adaptive architecture of quantitative resistance erosion in a plant fungal pathogen. Molecular Ecology, 31 (4) : 1160-1179.

Url - jeu de données - Entrepôt autre : https://doi.org/10.5061/dryad.80gb5mknf / Url - jeu de données - Entrepôt autre : https://doi.org/10.5061/dryad.rxwdbrv8r

Liste HCERES des revues (en SHS) : oui

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

Résumé : Plant pathogens often adapt to plant genetic resistance so characterization of the architecture underlying such an adaptation is required to understand the adaptive potential of pathogen populations. Erosion of banana quantitative resistance to a major leaf disease caused by polygenic adaptation of the causal agent, the fungus Pseudocercospora fijiensis, was recently identified in the northern Caribbean region. Genome scan and quantitative genetics approaches were combined to investigate the adaptive architecture underlying this adaptation. Thirty-two genomic regions showing host selection footprints were identified by pool sequencing of isolates collected from seven plantation pairs of two cultivars with different levels of quantitative resistance. Individual sequencing and phenotyping of isolates from one pair revealed significant and variable levels of correlation between haplotypes in 17 of these regions with a quantitative trait of pathogenicity (the diseased leaf area). The multilocus pattern of haplotypes detected in the 17 regions was found to be highly variable across all the population pairs studied. These results suggest complex adaptive architecture underlying plant pathogen adaptation to quantitative resistance with a polygenic basis, redundancy, and a low level of parallel evolution between pathogen populations. Candidate genes involved in quantitative pathogenicity and host adaptation of P. fijiensis were identified in genomic regions by combining annotation analysis with available biological data.

Mots-clés Agrovoc : agent pathogène, champignon pathogène, pouvoir pathogène, adaptation, génétique quantitative, pathologie végétale, Musa

Mots-clés complémentaires : Pseudocercospora fijiensis

Mots-clés libres : Fungal plant pathogen, Genome Scan, Host adaptation, Musa, Pseudocercospora fijiensis

Classification Agris : H20 - Maladies des plantes

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

Agences de financement européennes : European Regional Development Fund

Auteurs et affiliations

• Dumartinet Thomas, Université de Montpellier (FRA)
• Ravel Sébastien, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0001-6663-782X
• Roussel Véronique, CIRAD-BIOS-UMR PHIM (FRA)
• Perez-Vicente Luis, INISAV (CUB)
• Aguayo Jaime, ANSES (FRA)
• Abadie Catherine, CIRAD-BIOS-UMR PHIM (FRA)
• Carlier Jean, CIRAD-BIOS-UMR PHIM (FRA) ORCID: 0000-0002-6967-1852 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/600276/)

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