alexa Genome-wide Identification and Characterization of the
ISSN: 0974-276X

Journal of Proteomics & Bioinformatics
Open Access

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Research Article

Genome-wide Identification and Characterization of the Gene Families Controlling Fatty Acid Biosynthesis in Flax (Linum usitatissimum L)

Frank M You1*, Pingchuan Li1, Santosh Kumar2, Raja Ragupathy2, Zhengnan Li1, Yong-Bi Fu3 and Sylvie Cloutier2,4*

1Cereal Research Centre, Agriculture and Agri-Food Canada, Morden, Manitoba R6M 1Y5, Canada

2Plant Science Department, University of Manitoba, Winnipeg, Manitoba R3T 2N6, Canada

3Plant Gene Resources of Canada, Agriculture and Agri-Food Canada, Saskatoon, Saskatchewan S7N 0X2, Canada

4Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario K1A 0C6, Canada

Current address: Northwest Agriculture & Forestry University, China

*Corresponding Author:
Frank M You
Agriculture and Agri-Food Canada
Morden, Manitoba R6M 1Y5, Canada
Tel: 204-822-7525
Fax: 204-822-7507
E-mail: [email protected]

Agriculture and Agri-Food Canada
Ottawa, Ontario K1A 0C6
Canada
Tel: 613-759-1744
E-mail: [email protected]

Received Date: July 08, 2014; Accepted Date: September 06, 2014; Published Date: September 09, 2014

Citation: You FM, Li P, Kumar S, Ragupathy R, Li Z, et al. (2014) Genome-wide Identification and Characterization of the Gene Families Controlling Fatty Acid Biosynthesis in Flax (Linum usitatissimum L). J Proteomics Bioinform 7:310-326. doi:10.4172/jpb.1000334

Copyright: © 2014 You FM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

 

Abstract

Flax (Linum usitatissimum L.) is an important crop with many characteristic features such as its abundant essential ω-3 fatty acids for human nutrition. Fatty acid (FA) biosynthesis in plants, including flax, involves several consecutive steps governed by different gene families. Using in silico gene mining and comparative analysis, genome-wide gene identification and characterization were performed for six gene families related to FA biosynthesis, including KAS, SAD, FAD, KCS and FAT. We identified 91 FA-related genes from flax cv. CDC Bethune genome, from which seven previously cloned genes were validated. The newly identified 84 FA-related genes include 14 novel genes from the KAS family, two from the SAD family, 13 from the FAD2 family, three from the FAD3 family, 38 from the KCS family and 14 from the FAT family. Out of the 91 genes identified, 88 were duplicated as a consequence of recent whole genome duplication events, in which 13 FAD2 genes were hypothesized to have evolved from tandem gene duplication events followed by a whole genome duplication event and, more recently, by a single gene deletion. The six gene families described here are highly conserved in plants and have diverged anciently. These newly identified flax genes will be a useful resource for further research on FA gene cloning and expression, QTL identification, marker development and marker-assisted selection.

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