Pervasive hybridizations in the history of wheat relatives.
Sci Adv
; 5(5): eaav9188, 2019 05.
Article
in En
| MEDLINE
| ID: mdl-31049399
ABSTRACT
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phylogeny
/
Triticum
/
Evolution, Molecular
/
Hybridization, Genetic
Language:
En
Journal:
Sci Adv
Year:
2019
Document type:
Article
Affiliation country: