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The Aquilegia genome: adaptive radiation and an extraordinarily polymorphic chromosome with a unique history

By Danièle Filiault, Evangeline S. Ballerini, Terezie Mandáková, Gökçe Aköz, Nathan Derieg, Jeremy Schmutz, Jerry Jenkins, Jane Grimwood, Shengqiang Shu, Richard D. Hayes, Uffe Hellsten, Kerrie W. Barry, Juying Yan, Sirma Mihaltcheva, Miroslava Karafiátová, Viktoria Nizhynska, Martin A. Lysak, Scott A. Hodges, Magnus Nordborg

Posted 12 Feb 2018
bioRxiv DOI: 10.1101/264101 (published DOI: 10.7554/eLife.36426)

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 analysis reveals extensive allele sharing among species, and sheds light on the complex process of radiation. We also present the remarkable discovery that the evolutionary history of an entire chromosome differed from that of the rest of the genome --- a phenomenon which we do not fully understand, but which highlights the need to consider chromosomes in an evolutionary context.

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