Pont, C., Murat, F., Guizard, S., Flores, R., Foucrier, S., Bidet, Y., Quraishi, U.M., Alaux, M., Doležel, J., Fahima, T., Budak, H., Keller, B., Salvi, S., Maccaferri, M., Steinbach, D., Feuillet, C., Quesneville, H., Salse, J.
PLANT JOURNAL
76:
1030-1044,
2013
Keywords:
paleogenomics, dominance, partitioning, conserved orthologous set, single nucleotide polymorphism
Abstract:
Bread wheat derives from a grass ancestor structured in seven 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
conserved orthologous set (COS) 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 supra-dominant (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.
Fulltext: contact IEB authors
IEB authors: Jaroslav Doležel
