The emerging biofuel crop Camelina sativa retains a highly undifferentiated hexaploid genome structure

Sateesh Kagale, Chushin Koh, John Nixon, Venkatesh Bollina, Wayne E. Clarke, Reetu Tuteja, Charles Spillane, Stephen J. Robinson, Matthew G. Links, Carling Clarke, Erin E. Higgins, Terry Huebert, Andrew G. Sharpe () and Isobel A. P. Parkin ()
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Sateesh Kagale: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Chushin Koh: National Research Council Canada
John Nixon: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Venkatesh Bollina: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Wayne E. Clarke: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Reetu Tuteja: Plant and AgriBiosciences Centre (PABC), School of Natural Sciences, National University of Ireland Galway
Charles Spillane: Plant and AgriBiosciences Centre (PABC), School of Natural Sciences, National University of Ireland Galway
Stephen J. Robinson: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Matthew G. Links: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Carling Clarke: National Research Council Canada
Erin E. Higgins: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Terry Huebert: Saskatoon Research Centre, Agriculture and Agri-Food Canada
Andrew G. Sharpe: National Research Council Canada
Isobel A. P. Parkin: Saskatoon Research Centre, Agriculture and Agri-Food Canada

Nature Communications, 2014, vol. 5, issue 1, 1-11

Abstract: Abstract Camelina sativa is an oilseed with desirable agronomic and oil-quality attributes for a viable industrial oil platform crop. Here we generate the first chromosome-scale high-quality reference genome sequence for C. sativa and annotated 89,418 protein-coding genes, representing a whole-genome triplication event relative to the crucifer model Arabidopsis thaliana. C. sativa represents the first crop species to be sequenced from lineage I of the Brassicaceae. The well-preserved hexaploid genome structure of C. sativa surprisingly mirrors those of economically important amphidiploid Brassica crop species from lineage II as well as wheat and cotton. The three genomes of C. sativa show no evidence of fractionation bias and limited expression-level bias, both characteristics commonly associated with polyploid evolution. The highly undifferentiated polyploid genome of C. sativa presents significant consequences for breeding and genetic manipulation of this industrial oil crop.

Date: 2014
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DOI: 10.1038/ncomms4706

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