RT Journal Article
SR Electronic
T1 Wild to domesticates: genomes of edible diploid bananas hold traces of several undefined genepools
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2021.01.29.428762
DO 10.1101/2021.01.29.428762
A1 Sardos, Julie
A1 Breton, Catherine
A1 Perrier, Xavier
A1 Van Den Houwe, Ines
A1 Paofa, Janet
A1 Rouard, Mathieu
A1 Roux, Nicolas
YR 2021
UL http://biorxiv.org/content/early/2021/01/31/2021.01.29.428762.abstract
AB This study is an unprecedent exploration of the diversity of 226 diploid bananas genotyped with restriction-site-associated DNA sequencing data (RADseq) to clarify the processes that led to the creation of edible diploid AA bananas. This wide set included 72 seedy bananas, mostly M. acuminata from different genepools, and 154 edible, i.e. parthenocarpic and sterile, AA accessions obtained from genebanks and recent collecting missions. We highlighted the geographic organisation of the diversity of edible AAs and confirmed the admixed nature of many and further conducted introgressions tests within AAs from South East Asia and New Guinea. Lastly, taking advantage of the presence of an important number of M. acuminata ssp. banksii (22) and of AA from Papua New Guinea (76) in the set, we investigated the patterns of differentiation between wild and cultivated bananas seemingly belonging to the same genepool. We discovered a few cultivated AAs that may be of pure origins both in South-East Asia and in New Guinea. We also detected two undefined parental genepools in South East Asia for which regions of origin could be Thailand and a region between north Borneo and the Philippines, respectively. Finally, we suggest the existence of a third genepool in New Guinea island that might be a source population for both edible AAs and the local M. acuminata ssp. banksii.Competing Interest StatementThe authors have declared no competing interest.