Interspecific introgression patterns reveal the origins of worldwide cultivated bananas in New Guinea

Martin Guillaume, Cottin Aurélien, Baurens Franc-Christophe, Labadie Karine, Hervouet Catherine, Salmon Frédéric, Paulo De La Reberdière Nilda, Van Den Houwe Ines, Sardos Julie, Aury Jean-Marc, D'Hont Angélique, Yahiaoui Nabila. 2023. Interspecific introgression patterns reveal the origins of worldwide cultivated bananas in New Guinea. Plant Journal, 113 (4) : 802-818.

Url - jeu de données - Entrepôt autre : https://banana-genome-hub.southgreen.fr/gigwa / Url - jeu de données - Entrepôt autre : https://banana-genome-hub.southgreen.fr / Url - autres données associées : https://github.com/SouthGreenPlatform/VcfHunter

Résumé : Hybridizations between Musa species and subspecies, enabled by their transport via human migration, were proposed to have played an important role in banana domestication. We exploited sequencing data of 226 Musaceae accessions, including wild and cultivated accessions, to characterize the inter(sub)specific hybridization pattern that gave rise to cultivated bananas. We identified 11 genetic pools that contributed to cultivars, including two contributors of unknown origin. Informative alleles for each of these genetic pools were pinpointed and used to obtain genome ancestry mosaics of accessions. Diploid and triploid cultivars had genome mosaics involving three up to possibly seven contributors. The simplest mosaics were found for some diploid cultivars from New Guinea, combining three contributors, i.e., banksii and zebrina representing Musa acuminata subspecies and, more unexpectedly, the New Guinean species Musa schizocarpa. Breakpoints of M. schizocarpa introgressions were found to be conserved between New Guinea cultivars and the other analyzed diploid and triploid cultivars. This suggests that plants bearing these M. schizocarpa introgressions were transported from New Guinea and gave rise to currently cultivated bananas. Many cultivars showed contrasted mosaics with predominant ancestry from their geographical origin across Southeast Asia to New Guinea. This revealed that further diversification occurred in different Southeast Asian regions through hybridization with other Musa (sub)species, including two unknown ancestors that we propose to be M. acuminata ssp. halabanensis and a yet to be characterized M. acuminata subspecies. These results highlighted a dynamic crop formation process that was initiated in New Guinea, with subsequent diversification throughout Southeast Asia.

Mots-clés Agrovoc : Musa, domestication des plantes, hybridation interspécifique, Introgression, diversité génétique (comme ressource), variation génétique, phytogénétique

Mots-clés géographiques Agrovoc : Papouasie-Nouvelle-Guinée

Mots-clés libres : Genome ancestry, Musa spp., Hybridization, Domestication, Genetic diversity

Classification Agris : F30 - Génétique et amélioration des plantes
F01 - Culture des plantes

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Agences de financement hors UE : Agence Nationale de la Recherche, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Agropolis Fondation

Projets sur financement : (FRA) France Génomique-INBS, (FRA) Agricultural Sciences for sustainable Development

Auteurs et affiliations

• Martin Guillaume, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-1801-7500 - auteur correspondant
• Cottin Aurélien, Université de Montpellier (FRA)
• Baurens Franc-Christophe, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-5219-8771
• Labadie Karine, Genoscope (FRA)
• Hervouet Catherine, CIRAD-BIOS-UMR AGAP (FRA)
• Salmon Frédéric, CIRAD-BIOS-UMR AGAP (GLP)
• Paulo De La Reberdière Nilda, CIRAD-BIOS-UMR AGAP (GLP)
• Van Den Houwe Ines, Bioversity International (BEL)
• Sardos Julie, CIRAD-BIOS-UMR AGAP (FRA)
• Aury Jean-Marc, Institut de génomique (FRA)
• D'Hont Angélique, CIRAD-BIOS-UMR AGAP (FRA)
• Yahiaoui Nabila, CIRAD-BIOS-UMR AGAP (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/603495/)

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