Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Genome ancestry mosaics reveal multiple and cryptic contributors to cultivated banana

Abstract : Hybridizations between closely related species commonly occur in the domestication process of many crops. Banana cultivars are derived from such hybridizations between species and subspecies of the Musa genus that have diverged in various tropical Southeast Asian regions and archipelagos. Among the diploid and triploid hybrids generated, those with seedless parthenocarpic fruits were selected by humans and thereafter dispersed through vegetative propagation. Musa acuminata subspecies contribute to most of these cultivars. We analyzed sequence data from 14 M. acuminata wild accessions and 10 M. acuminata-based cultivars, including diploids and one triploid, to characterize the ancestral origins along their chromosomes. We used multivariate analysis and single nucleotide polymorphism clustering and identified five ancestral groups as contributors to these cultivars. Four of these corresponded to known M. acuminata subspecies. A fifth group, found only in cultivars, was defined based on the 'Pisang Madu' cultivar and represented two uncharacterized genetic pools. Diverse ancestral contributions along cultivar chromosomes were found, resulting in mosaics with at least three and up to five ancestries. The commercially important triploid Cavendish banana cultivar had contributions from at least one of the uncharacterized genetic pools and three known M. acuminata subspecies. Our results highlighted that cultivated banana origins are more complex than expected - involving multiple hybridization steps - and also that major wild banana ancestors have yet to be identified. This study revealed the extent to which admixture has framed the evolution and domestication of a crop plant.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [50 références]  Voir  Masquer  Télécharger

https://hal.inrae.fr/hal-02628306
Déposant : Migration Prodinra <>
Soumis le : mardi 26 mai 2020 - 22:41:55
Dernière modification le : mardi 3 novembre 2020 - 13:52:03

Fichier

publis20-agap-003_martin_genom...
Fichiers éditeurs autorisés sur une archive ouverte

Licence


Distributed under a Creative Commons Paternité - Pas d'utilisation commerciale 4.0 International License

Identifiants

Collections

Citation

Guillaume Martin, Céline Cardi, Gautier Sarah, Sébastien Ricci, Christophe Jenny, et al.. Genome ancestry mosaics reveal multiple and cryptic contributors to cultivated banana. Plant Journal, Wiley, 2020, 102 (5), pp.1008-1025. ⟨10.1111/tpj.14683⟩. ⟨hal-02628306⟩

Partager

Métriques

Consultations de la notice

424

Téléchargements de fichiers

67