The Brassica oleracea genome reveals the asymmetrical evolution of polyploid genomes

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DOIResolve DOI: http://doi.org/10.1038/ncomms4930
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TypeArticle
Journal titleNature Communications
ISSN2041-1723
Volume5
Article number3930
Pages111; # of pages: 21
Subjectalternative RNA splicing; article; Brassica oleracea; broccoli; cabbage; cauliflower; chromosome rearrangement; comparative study; evolution; gene expression; gene loss; gene sequence; genetic variability; genome; genomics; nonhuman; polyploidy; transposon
AbstractPolyploidization has provided much genetic variation for plant adaptive evolution, but the mechanisms by which the molecular evolution of polyploid genomes establishes genetic architecture underlying species differentiation are unclear. Brassica is an ideal model to increase knowledge of polyploid evolution. Here we describe a draft genome sequence of Brassica oleracea, comparing it with that of its sister species B. rapa to reveal numerous chromosome rearrangements and asymmetrical gene loss in duplicated genomic blocks, asymmetrical amplification of transposable elements, differential gene co-retention for specific pathways and variation in gene expression, including alternative splicing, among a large number of paralogous and orthologous genes. Genes related to the production of anticancer phytochemicals and morphological variations illustrate consequences of genome duplication and gene divergence, imparting biochemical and morphological variation to B. oleracea. This study provides insights into Brassica genome evolution and will underpin research into the many important crops in this genus.
Publication date
LanguageEnglish
AffiliationAquatic and Crop Resource Development; National Research Council Canada
Peer reviewedYes
NRC numberNRC-ACRD-56002
NPARC number21272678
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Record identifiere9e56c8b-4a48-48ff-b5fe-257bb18c1ab0
Record created2014-12-03
Record modified2016-05-09
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