Article Dans Une Revue Nature Communications Année : 2025

Unravelling genomic drivers of speciation in Musa through genome assemblies of wild banana ancestors

Benjamin Istace
Caroline Belser
Benjamin Noel
Patrick Wincker
Jean-Marc Aury

Résumé

Hybridization between wild Musa species and subspecies from Southeast Asia is at the origin of cultivated bananas. The genomes of these cultivars are complex mosaics involving nine genetic groups, including two previously unknown contributors. This study provides continuous genome assemblies for six wild genetic groups, one of which represents one of the unknown ancestor, identified as M. acuminata ssp. halabanensis. The second unknown ancestor partially present in a seventh assembly appears related to M. a. ssp. zebrina. These assemblies provide key resources for banana genetics and for improving cultivar assemblies, including that of the emblematic triploid Cavendish. Comparative and phylogenetic analyses reveal an ongoing speciation process within Musa, characterised by large chromosome rearrangements and centromere differentiation through the integration of different types of repeated sequences, including rDNA tandem repeats. This speciation process may have been favoured by reproductive isolation related to the particular context of climate and land connectivity fluctuations in the Southeast Asian region.
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Cite 10.18167/DVN1/6TLMD3 Jeu de données Baurens, Franc-Christophe; Martin, Guillaume, 2024, "Source Data to study Genome assemblies of Musa wild banana ancestors and draw figures.", https://doi.org/10.18167/DVN1/6TLMD3

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hal-04911301 , version 1 (24-01-2025)

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Guillaume Martin, Benjamin Istace, Franc-Christophe Baurens, Caroline Belser, Catherine Hervouet, et al.. Unravelling genomic drivers of speciation in Musa through genome assemblies of wild banana ancestors. Nature Communications, 2025, 16, pp.961. ⟨10.1038/s41467-025-56329-4⟩. ⟨hal-04911301⟩
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