Genetic analysis of global faba bean diversity, agronomic traits and selection signatures - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Article Dans Une Revue TAG Theoretical and Applied Genetics Année : 2023

Genetic analysis of global faba bean diversity, agronomic traits and selection signatures

Jonathan Kreplak
Andrea Schiemann
  • Fonction : Auteur
Jens Knudsen
  • Fonction : Auteur
Jens Stougaard
Stig Uggerhøj Andersen

Résumé

Key message We identified marker-trait associations for key faba bean agronomic traits and genomic signatures of selection within a global germplasm collection. Abstract Faba bean (Vicia faba L.) is a high-protein grain legume crop with great potential for sustainable protein production. However, little is known about the genetics underlying trait diversity. In this study, we used 21,345 high-quality SNP markers to genetically characterize 2678 faba bean genotypes. We performed genome-wide association studies of key agronomic traits using a seven-parent-MAGIC population and detected 238 significant marker-trait associations linked to 12 traits of agronomic importance. Sixty-five of these were stable across multiple environments. Using a non-redundant diversity panel of 685 accessions from 52 countries, we identified three subpopulations differentiated by geographical origin and 33 genomic regions subjected to strong diversifying selection between subpopulations. We found that SNP markers associated with the differentiation of northern and southern accessions explained a significant proportion of agronomic trait variance in the sevenparent-MAGIC population, suggesting that some of these traits were targets of selection during breeding. Our findings point to genomic regions associated with important agronomic traits and selection, facilitating faba bean genomics-based breeding. Abbreviations cha Character cs Chocolate spot dm Downy mildew
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hal-04087655 , version 1 (03-05-2023)

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Cathrine Kiel Skovbjerg, Deepti Angra, Tom Robertson-Shersby-Harvie, Jonathan Kreplak, Gabriel Keeble-Gagnère, et al.. Genetic analysis of global faba bean diversity, agronomic traits and selection signatures. TAG Theoretical and Applied Genetics, 2023, 136 (114), ⟨10.1007/s00122-023-04360-8⟩. ⟨hal-04087655⟩
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