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Journal Articles Science Year : 2014

Ancient hybridizations among the ancestral genomes of bread wheat

T. Marcussen (1) , S. Sandve (1) , L. Heier (2) , M. Spannagl (3, 4) , M. Pfeifer (4, 3) , K. Jakobsen , B. Wulff (5) , B. Steuernagel (5) , K. Mayer (3, 4) , O.-A. Olsen , J. Rogers , J. Dole el , C. Pozniak , K. Eversole (6) , C. Feuillet (7) , B. Gill , B. Friebe , A. Lukaszewski , Pierre Sourdille (8) , T. Endo , M. Kubalakova (9) , J.  ihalikova , Z. Dubska , J. Vrana (9) , R.  perkova , H.  imkova , M. Febrer , L. Clissold , K. Mclay , K. Singh (10) , P. Chhuneja , N. Singh , J. Khurana , E. Akhunov , F. Choulet (11, 8) , A. Alberti (12) , Valérie Barbe (13) , P. Wincker (14) , H. Kanamori (15) , F. Kobayashi , T. Itoh , T. Matsumoto (16) , H. Sakai (17) , T. Tanaka (18) , J. Wu (19) , Y. Ogihara , H. Handa , P. Maclachlan , A. Sharpe , D. Klassen , D. Edwards , J. Batley (20) , S. Lien (1) , M. Caccamo , S. Ayling , R. Ramirez-Gonzalez , B. Clavijo , J. Wright (21) , M. Martis , M. Mascher , J. Chapman , J. Poland , U. Scholz , K. Barry , R. Waugh , D. Rokhsar , G. Muehlbauer , N. Stein (22) , H. Gundlach , M. Zytnicki , Véronique Jamilloux (23) , H. Quesneville (23) , T. Wicker (24) , P. Faccioli , M. Colaiacovo , A. Stanca , H. Budak , L. Cattivelli (25) , N. Glover (8) , L. Pingault (8) , E. Paux (8) , S. Sharma (26) , R. Appels (27) , M. M. Bellgard (28) , B. Chapman (29) , T. Nussbaumer (30) , K. Bader , H. Rimbert (31) , S. Wang , R. Knox , A. Kilian (32) , M. Alaux , F. Alfama , L. Couderc , N. Guilhot (8) , C. Viseux , M. Loaec , B. Keller (33) , S. Praud (34)
K. Jakobsen
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O.-A. Olsen
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J. Rogers
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J. Dole el
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C. Pozniak
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K. Eversole
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C. Feuillet
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B. Gill
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B. Friebe
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A. Lukaszewski
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T. Endo
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J.  ihalikova
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Z. Dubska
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R.  perkova
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H.  imkova
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M. Febrer
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L. Clissold
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K. Mclay
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P. Chhuneja
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N. Singh
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J. Khurana
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E. Akhunov
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Valérie Barbe
P. Wincker
F. Kobayashi
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T. Itoh
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T. Tanaka
Y. Ogihara
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H. Handa
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P. Maclachlan
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A. Sharpe
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D. Klassen
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D. Edwards
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M. Caccamo
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S. Ayling
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R. Ramirez-Gonzalez
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B. Clavijo
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J. Wright
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M. Martis
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M. Mascher
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J. Chapman
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J. Poland
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U. Scholz
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K. Barry
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R. Waugh
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D. Rokhsar
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G. Muehlbauer
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H. Gundlach
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M. Zytnicki
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P. Faccioli
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M. Colaiacovo
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A. Stanca
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H. Budak
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R. Appels
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K. Bader
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H. Rimbert
S. Wang
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R. Knox
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M. Alaux
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F. Alfama
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L. Couderc
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C. Viseux
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M. Loaec
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S. Praud
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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 similar to 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.
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Dates and versions

hal-02889053 , version 1 (03-07-2020)

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T. Marcussen, S. Sandve, L. Heier, M. Spannagl, M. Pfeifer, et al.. Ancient hybridizations among the ancestral genomes of bread wheat. Science, 2014, 345 (6194), pp.1250092-1250092. ⟨10.1126/science.1250092⟩. ⟨hal-02889053⟩
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