Pervasive hybridizations in the history of wheat relatives

Glemin Sylvain, Scornavacca Céline, Dainat Jacques, Burgarella Concetta, Viader Véronique, Ardisson Morgane, Sarah Gautier, Santoni Sylvain, David Jacques, Ranwez Vincent. 2019. Pervasive hybridizations in the history of wheat relatives. Science Advances, 5 (5), 10 p.

https://doi.org/10.1126/sciadv.aav9188

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Url - jeu de données - Entrepôt autre : https://bioweb.supagro.inra.fr/WheatRelativeHistory/

Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Cultivated wheats are derived from an intricate history of three genomes, A, B, and D, present in both diploid and polyploid species. It was recently proposed that the D genome originated from an ancient hybridization between the A and B lineages. However, this result has been questioned, and a robust phylogeny of wheat relatives is still lacking. Using transcriptome data from all diploid species and a new methodological approach, our comprehensive phylogenomic analysis revealed that more than half of the species descend from an ancient hybridization event but with a more complex scenario involving a different parent than previously thought—Aegilops mutica, an overlooked wild species—instead of the B genome. We also detected other extensive gene flow events that could explain long-standing controversies in the classification of wheat relatives.

Mots-clés Agrovoc : phylogénie, amélioration des plantes, polyploïdie, génomique, triples, génome, domestication des plantes

Mots-clés géographiques Agrovoc : France

Agences de financement hors UE : Agence Nationale de la Recherche

Projets sur financement : (FRA) Les transitions de systèmes de reproduction chez les angiosperms et leurs conséquences génomiques

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