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Reconciling the evolutionary origin of bread wheat (Triticum aestivum)

by Burlot, Laura , Molinier, Mélanie , Alaux, Michael , Pont, Caroline , European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS , Murat, Florent , Quesneville, Hadi , Unité de Recherche Génomique Info (URGI) ; Institut National de la Recherche Agronomique (INRA) , El Baidouri, Moaine , Flores, Raphaël-Gauthier , Génétique Diversité et Ecophysiologie des Céréales (GDEC) ; Institut National de la Recherche Agronomique (INRA)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP) , Veyssière, Maeva , Salse, Jerome

in Aegilops speltoides / Agricultural sciences / ancestor / asymmetry / Biological Evolution / Bread / diploidy / DNA Transposable Elements - genetics / evolution / genome / Genome, Plant / hexaploidy / hybrids / Life Sciences / Models, Genetic / Mutagenesis, Insertional - genetics / mutation / Mutation - genetics / origin / Polymorphism, Single Nucleotide - genetics / polyploidization / Synteny - genetics / tetraploidy / transposons / Triticum - genetics / Triticum aestivum / Triticum urartu / Wheat

2017

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2017

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2017

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Journal Article

Reconciling the evolutionary origin of bread wheat (Triticum aestivum)

Burlot, Laura,

Molinier, Mélanie,

Alaux, Michael,

Pont, Caroline,

European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS,

Murat, Florent,

Quesneville, Hadi,

Unité de Recherche Génomique Info (URGI) ; Institut National de la Recherche Agronomique (INRA),

El Baidouri, Moaine,

Flores, Raphaël-Gauthier,

Génétique Diversité et Ecophysiologie des Céréales (GDEC) ; Institut National de la Recherche Agronomique (INRA)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP),

Veyssière, Maeva,

Salse, Jerome

2017

Overview

The origin of bread wheat (Triticum aestivum; AABBDD) has been a subject of controversy and of intense debate in the scientific community over the last few decades. In 2015, three articles published in New Phytologist discussed the origin of hexaploid bread wheat (AABBDD) from the diploid progenitors Triticum urartu (AA), a relative of Aegilops speltoides (BB) and Triticum tauschii (DD). Access to new genomic resources since 2013 has offered the opportunity to gain novel insights into the paleohistory of modern bread wheat, allowing characterization of its origin from its diploid progenitors at unprecedented resolution. We propose a reconciled evolutionary scenario for the modern bread wheat genome based on the complementary investigation of transposable element and mutation dynamics between diploid, tetraploid and hexaploid wheat. In this scenario, the structural asymmetry observed between the A, B and D subgenomes in hexaploid bread wheat derives from the cumulative effect of diploid progenitor divergence, the hybrid origin of the D subgenome, and subgenome partitioning following the polyploidization events.

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Publisher

Wiley,HAL CCSD,New Phytologist Trust,Wiley Subscription Services, Inc

Subject

Aegilops speltoides

/ Agricultural sciences

/ ancestor

/ asymmetry

/ Biological Evolution

/ Bread

/ diploidy