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Prevalence of gene expression additivity in genetically stable wheat allohexaploids
Author(s) -
Chelaifa Houda,
Chagué Véronique,
Chalabi Smahane,
Mestiri Imen,
Arnaud Dominique,
Deffains Denise,
Lu Yunhai,
Belcram Harry,
Huteau Virginie,
Chiquet Julien,
Coriton Olivier,
Just Jérémy,
Jahier Joseph,
Chalhoub Boulos
Publication year - 2013
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.12108
Subject(s) - aegilops tauschii , genome , biology , gene , gene expression , genetics , ploidy , transcriptome , common wheat , chromosome
Summary 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.