title: Prevalence of gene expression additivity in genetically stable wheat allohexaploids.
abstract: The reprogramming of gene expression appears as the major trend in synthetic and natural allopolyploids where expression of an important proportion of genes was shown to deviate from that of the parents or the average of the parents. In this study, we analyzed gene expression changes in previously reported, highly stable synthetic wheat allohexaploids that combine the D genome of Aegilops tauschii and the AB genome extracted from the natural hexaploid wheat Triticum aestivum. A comprehensive genome-wide analysis of transcriptional changes using the Affymetrix GeneChip Wheat Genome Array was conducted. Prevalence of gene expression additivity was observed where expression does not deviate from the average of the parents for 99.3% of 34,820 expressed transcripts. Moreover, nearly similar expression was observed (for 99.5% of genes) when comparing these synthetic and natural wheat allohexaploids. Such near-complete additivity has never been reported for other allopolyploids and, more interestingly, for other synthetic wheat allohexaploids that differ from the ones studied here by having the natural tetraploid Triticum turgidum as the AB genome progenitor. Our study gave insights into the dynamics of additive gene expression in the highly stable wheat allohexaploids.
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Houda
authors.initials: H
authors.lastname: Chelaifa
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Chagué
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Smahane
authors.initials: S
authors.lastname: Chalabi
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Imen
authors.initials: I
authors.lastname: Mestiri
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Dominique
authors.initials: D
authors.lastname: Arnaud
authors.affiliation: Unité Mixte de Recherches INRA, Agrocampus Rennes - Université Rennes 1, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), 35653, Le Rheu, France.
authors.forename: Denise
authors.initials: D
authors.lastname: Deffains
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Yunhai
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Harry
authors.initials: H
authors.lastname: Belcram
authors.affiliation: Unité Mixte de Recherches INRA, Agrocampus Rennes - Université Rennes 1, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), 35653, Le Rheu, France.
authors.forename: Virginie
authors.initials: V
authors.lastname: Huteau
authors.affiliation: Laboratoire Statistique et Génome, Université d'Évry Val d'Essonne, UMR CNRS 8071 - USC INRA, Evry, France.
authors.forename: Julien
authors.initials: J
authors.lastname: Chiquet
authors.affiliation: Unité Mixte de Recherches INRA, Agrocampus Rennes - Université Rennes 1, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), 35653, Le Rheu, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Coriton
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Jérémy
authors.initials: J
authors.lastname: Just
authors.affiliation: Unité Mixte de Recherches INRA, Agrocampus Rennes - Université Rennes 1, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), 35653, Le Rheu, France.
authors.forename: Joseph
authors.initials: J
authors.lastname: Jahier
authors.affiliation: Unité de Recherche en Génomique Végétale URGV (INRA- CNRS - UEVE), Organization and Evolution of Plant Genomes, 91057, Evry Cedex, France.
authors.forename: Boulos
authors.initials: B
authors.lastname: Chalhoub
mesh_terms: D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018745:Genome, Plant; D042822:Genomic Instability; D011123:Polyploidy; D014908:Triticum / Q000235:genetics*