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The Aquilegia genome provides insight into adaptive radiation and reveals an extraordinarily polymorphic chromosome with a unique history.

  • Author(s): Filiault, Danièle L
  • Ballerini, Evangeline S
  • Mandáková, Terezie
  • Aköz, Gökçe
  • Derieg, Nathan J
  • Schmutz, Jeremy
  • Jenkins, Jerry
  • Grimwood, Jane
  • Shu, Shengqiang
  • Hayes, Richard D
  • Hellsten, Uffe
  • Barry, Kerrie
  • Yan, Juying
  • Mihaltcheva, Sirma
  • Karafiátová, Miroslava
  • Nizhynska, Viktoria
  • Kramer, Elena M
  • Lysak, Martin A
  • Hodges, Scott A
  • Nordborg, Magnus
  • et al.
Abstract

The columbine genus Aquilegia is a classic example of an adaptive radiation, involving a wide variety of pollinators and habitats. Here we present the genome assembly of A. coerulea 'Goldsmith', complemented by high-coverage sequencing data from 10 wild species covering the world-wide distribution. Our analyses reveal extensive allele sharing among species and demonstrate that introgression and selection played a role in the Aquilegia radiation. We also present the remarkable discovery that the evolutionary history of an entire chromosome differs from that of the rest of the genome - a phenomenon that we do not fully understand, but which highlights the need to consider chromosomes in an evolutionary context.

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