Ancient hybridizations among the ancestral genomes of bread wheat
Journal
Science
Journal Volume
345
Journal Issue
6194
Date Issued
2014-01-01
Author(s)
Marcussen, Thomas
Sandve, Simen R.
Heier, Lise
Spannagl, Manuel
Pfeifer, Matthias
Jakobsen, Kjetill S.
Wulff, Brande B.H.
Steuernagel, Burkhard
Mayer, Klaus F.X.
Olsen, Odd Arne
Rogers, Jane
Doležel, Jaroslav
Pozniak, Curtis
Eversole, Kellye
Feuillet, Catherine
Gill, Bikram
Friebe, Bernd
Lukaszewski, Adam J.
Sourdille, Pierre
Endo, Takashi R.
Kubaláková, Marie
Šíhalíková, Jarmila
Dubská, Zdeňka
Vrána, Jan
Šperková, Romana
Šimková, Hana
Febrer, Melanie
Clissold, Leah
McLay, Kirsten
Singh, Kuldeep
Chhuneja, Parveen
Singh, Nagendra K.
Khurana, Jitendra
Akhunov, Eduard
Choulet, Frédéric
Alberti, Adriana
Barbe, Valérie
Wincker, Patrick
Kanamori, Hiroyuki
Kobayashi, Fuminori
Matsumoto, Takashi
Sakai, Hiroaki
Tanaka, Tsuyoshi
Wu, Jianzhong
Ogihara, Yasunari
Handa, Hirokazu
Maclachlan, P. Ron
Sharpe, Andrew
Klassen, Darrin
Edwards, David
Batley, Jacqueline
Lien, Sigbjørn
Caccamo, Mario
Ayling, Sarah
Ramirez-Gonzalez, Ricardo H.
Clavijo, Bernardo J.
Wright, Jonathan
Martis, Mihaela M.
Mascher, Martin
Chapman, Jarrod
Poland, Jesse A.
Scholz, Uwe
Barry, Kerrie
Waugh, Robbie
Rokhsar, Daniel S.
Muehlbauer, Gary J.
Stein, Nils
Gundlach, Heidrun
Zytnicki, Matthias
Jamilloux, Véronique
Quesneville, Hadi
Wicker, Thomas
Faccioli, Primetta
Colaiacovo, Moreno
Stanca, Antonio Michele
Budak, Hikmet
Cattivelli, Luigi
Glover, Natasha
Pingault, Lise
Paux, Etienne
Sharma, Sapna
Appels, Rudi
Bellgard, Matthew
Chapman, Brett
Nussbaumer, Thomas
Bader, Kai Christian
Rimbert, Hélène
Wang, Shichen
Knox, Ron
Kilian, Andrzej
Alaux, Michael
Alfama, Françoise
Couderc, Loïc
Guilhot, Nicolas
Viseux, Claire
Loaec, Mikaël
Keller, Beat
Praud, Sebastien
Abstract
The allohexaploid bread wheat genome consists of three closely related subgenomes (A, B, and D), but a clear understanding of their phylogenetic history has been lacking. We used genome assemblies of bread wheat and five diploid relatives to analyze genome-wide samples of gene trees, as well as to estimate evolutionary relatedness and divergence times. We show that the A and B genomes diverged from a common ancestor ~7 million years ago and that these genomes gave rise to the D genome through homoploid hybrid speciation 1 to 2 million years later. Our findings imply that the present-day bread wheat genome is a product of multiple rounds of hybrid speciation (homoploid and polyploid) and lay the foundation for a new framework for understanding the wheat genome as a multilevel phylogenetic mosaic.
SDGs
Type
journal article