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Wheat syntenome unveils new evidences of contrasted evolutionary plasticity between paleo- and neoduplicated subgenomes

Abstract : Bread wheat derives from a grass ancestor structured in 7 protochromosomes followed by a paleotetraploidization to reach a 12 chromosomes intermediate and a neohexaploidization (involving subgenomes A, B and D) event that finally shaped the 21 modern chromosomes. Insights into wheat syntenome in sequencing COS (Conserved Orthologous Set) genes unravelled differences in genomic structure (such as gene conservation and diversity) and genetical landscape (such as recombination pattern) between ancestral as well as recent duplicated blocks. Contrasted evolutionary plasticity is observed where the B subgenome appears more sensitive (i.e. plastic) in contrast to A as dominant (i.e. stable) in response to the neotetraploidization and D subgenome as supradominant (i.e. pivotal) in response to the neohexaploidization event. Finally, the wheat syntenome, delivered through a public web interface PlantSyntenyViewer at http://urgi.versailles.inra.fr/synteny-wheat, can be considered as a guide for accelerated dissection of major agronomical traits in wheat. This article is protected by copyright. All rights reserved.
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https://hal.archives-ouvertes.fr/hal-00964421
Contributor : Archive Ouverte Prodinra <>
Submitted on : Monday, March 24, 2014 - 11:00:00 AM
Last modification on : Tuesday, March 17, 2020 - 2:12:06 AM

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Caroline Pont, Florent Murat, Sébastien Guizard, Raphaël-Gauthier Flores, Séverine Foucrier, et al.. Wheat syntenome unveils new evidences of contrasted evolutionary plasticity between paleo- and neoduplicated subgenomes. Plant Journal, Wiley, 2013, pp.1-29. ⟨10.1111/tpj.12366⟩. ⟨hal-00964421⟩

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