Genome ancestry mosaics reveal multiple and cryptic contributors to cultivated banana

Autor: Martin, guillaume, Cardi, Céline, Sarah, Gautier, Ricci, Sébastien, Jenny, Christophe, Fondi, Emmanuel, PERRIER, Xavier, Glaszmann, Jean-Christophe, D'Hont, Angélique, Yahiaoui, Nabila
Přispěvatelé: Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), African Center for Research on Bananas and Plantains = Centre Africain de Recherches sur Bananiers et Plantains (CARBAP), French National Research Agency (ANR) : 0900-001, ANR-10-LABX-0001-01, French National Research Agency (ANR) : ANR-10-LABX-0001-01, 1504-006, CGIAR Research Programme on Roots, Tubers, and Bananas (RTB), CIRAD - UMR AGAP HPC Data Center of the South Green Bioinfor-matics platform, ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Plant Journal (In press), 1-18. (2020)
Plant Journal
The Plant Journal
Plant Journal, Wiley, 2020, 102 (5), pp.1008-1025. ⟨10.1111/tpj.14683⟩
ISSN: 0960-7412
1365-313X
Popis: Summary 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.
Significance Statement Hybridizations between subspecies of Musa acuminata are at the origin of a diversity of banana cultivars whose genomes remain to be fully characterized for their ancestry. We developed a bioinformatics approach to decipher the genome ancestry mosaic in a set of banana cultivars including the commercially important Cavendish banana. We revealed that the cultivars resulted from multiple hybridization events involving known M. acuminata subspecies but also unknown contributors still to be discovered. These results bring essential information for breeding strategies in this crop that is particularly threatened by disease.
Databáze: OpenAIRE
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