Structural and Functional Partitioning of Bread Wheat Chromosome 3B

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Choulet, Frédéric | Alberti, Adriana, A. | Theil, Sébastien | Glover, Natasha Marie | Barbe, Valérie | Daron, Josquin | Pingault, Lise | Sourdille, Pierre | Couloux, Arnaud | Paux, Etienne | Leroy, Philippe | Mangenot, Sophie | Guilhot, Nicolas, N. | Le Gouis, Jacques | Balfourier, François | Alaux, Michael, M. | Jamilloux, Véronique | Julie, Poulain | Durand, Celine | Bellec, Arnaud, A. | Gaspin, Christine | Dolezel, Jaroslav | Rogers, Jane | Vandepoele, Klaas | Aury, Jean-Marc | Mayer, Klaus | Berges, Helene, H. | Quesneville, Hadi | Wincker, Patrick | Feuillet, Catherine, C.

Edité par CCSD ; American Association for the Advancement of Science (AAAS) -

International audience. We produced a reference sequence of the 1-gigabase chromosome 3B of hexaploid bread wheat. By sequencing 8452 bacterial artificial chromosomes in pools, we assembled a sequence of 774 megabases carrying 5326 protein-coding genes, 1938 pseudogenes, and 85% of transposable elements. The distribution of structural and functional features along the chromosome revealed partitioning correlated with meiotic recombination. Comparative analyses indicated high wheat-specific inter- and intrachromosomal gene duplication activities that are potential sources of variability for adaption. In addition to providing a better understanding of the organization, function, and evolution of a large and polyploid genome, the availability of a high-quality sequence anchored to genetic maps will accelerate the identification of genes underlying important agronomic traits.

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