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Marcussen, T.* ; Sandve, S.R.* ; Heier, L.* ; Spannagl, M. ; Pfeifer, M. ; International Wheat Genome Sequencing Consortium (*) ; Jakobsen, K.S.* ; Wulff, B.B.* ; Steuernagel, B.* ; Mayer, K.F.X. ; Olsen, O.A.*

Ancient hybridizations among the ancestral genomes of bread wheat.

Science 345:1250092 (2014)
DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
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.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
ISSN (print) / ISBN 0036-8075
e-ISSN 1095-9203
Zeitschrift Science
Quellenangaben Band: 345, Heft: 6194, Seiten: , Artikelnummer: 1250092 Supplement: ,
Verlag American Association for the Advancement of Science (AAAS)
Begutachtungsstatus Peer reviewed