Authors: M. Iorizzo, S. Ellison, D. Senalik, P. Zeng, P. Satapoomin, J. Huang, M. Bowman, M. Iovene, W. Sanseverino, P. Cavagnaro, M. Yildiz, A. Macko-Podgórni, E. Moranska, E. Grzebelus, D. Grzebelus, H. Ashrafi, Z. Zheng, S. Cheng, D. Spooner, A. Van Deynze & P. Simon

Institutions:

  • Plants for Human Health Institute, Department of Horticultural Science, North Carolina State University, Kannapolis, North Carolina, USA (M. Iorizzo) and Department of Horticultural Science, North Carolina State University, Raleigh, North Carolina, USA (H.A.).,
  • Department of Horticulture, University of Wisconsin–Madison, Madison, Wisconsin, USA
  • Beijing Genomics Institute–Shenzhen, Shenzhen, China
  • Department of Plant Biology, Michigan State University, East Lansing, Michigan, USA
  • Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
  • Sequentia Biotech, Barcelona, Spain
  • National Scientific and Technical Research Council (CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Cuyo, Argentina
  • Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria La Consulta, La Consulta, Argentina
  • Department of Agricultural Biotechnology, Faculty of Agriculture, Yuzuncu Yil University, Van, Turkey
  • Institute of Plant Biology and Biotechnology, University of Agriculture in Krakow, Krakow, Poland
  • Seed Biotechnology Center, University of California, Davis, Davis, California, USA

Publication: Nature Genetics

Date: May 2016

Full paper: http://doi.org/10.1038/ng.3565

Abstract: We report a high-quality chromosome-scale assembly and analysis of the carrot (Daucus carota) genome, the first sequenced genome to include a comparative evolutionary analysis among members of the euasterid II clade. We characterized two new polyploidization events, both occurring after the divergence of carrot from members of the Asterales order, clarifying the evolutionary scenario before and after radiation of the two main asterid clades. Large- and small-scale lineage-specific duplications have contributed to the expansion of gene families, including those with roles in flowering time, defense response, flavor, and pigment accumulation. We identified a candidate gene, DCAR_032551, that conditions carotenoid accumulation (Y) in carrot taproot and is coexpressed with several isoprenoid biosynthetic genes. The primary mechanism regulating carotenoid accumulation in carrot taproot is not at the biosynthetic level. We hypothesize that DCAR_032551 regulates upstream photosystem development and functional processes, including photomorphogenesis and root de-etiolation.