The Brassica oleracea genome reveals the asymmetrical evolution of polyploid genomes

Polyploidization 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…

• NS
  National Science Foundation

  Awards: 1021718, DBI 0849896, 0638418, MCB 1021718
• NN
  National Natural Science Foundation of China

  Awards: CARS-25, CARS-13, 31301039, 201103016
• DF
  Directorate for Biological Sciences
• BA
  Biotechnology and Biological Sciences Research Council

  Award: BB/E017363/1
• AR
  Australian Research Council

  Awards: LP110100200, LP0883462, DP0985953, LP0882095
• SF
  Special Fund for Agro-scientific Research in the Public Interest

  Award: 201103016
• NK
  National Key Research and Development Program of China

  Awards: 2013AA102602, CARS-25, CARS-13, 2011CB109300