Euphytica

, 214:28 | Cite as

EMS-induced mutation of an endoplasmic reticulum oleate desaturase gene (FAD2-2) results in elevated oleic acid content in rapeseed (Brassica napus L.)

  • Yong-Hwa Lee
  • Won Park
  • Kwang-Soo Kim
  • Young-Seok Jang
  • Ji-Eun Lee
  • Young-Lok Cha
  • Youn-Ho Moon
  • Yeon-Sang Song
  • Kyeongbo Lee
Article
  • 71 Downloads

Abstract

The development of rapeseed cultivars (Brassica napus L.) with high oleic acid and low linolenic acid is highly desirable for food and industrial applications. In this study, the Korean rapeseed cultivar Tamla was used for ethyl methanesulfonate (EMS)-induced mutagenesis and seed oils were screened up to generation M7 for high oleate mutants. Two mutant populations (M7) with an average of approximately 76% oleic acid content were isolated. Yield components between two mutant populations and untreated Tamla plants were not substantially different, although the mutants in the vegetative stage were slightly smaller in size than Tamla. Genomic analyses of six fatty acid desaturase (four FAD2 and two FAD6) genes revealed that the elevated oleic acid content in the mutants is the result of single gene mutations. Changes in DNA sequence were observed in two genes out of six fatty acid desaturase (four FAD2 and two FAD6). FAD2-2 exhibited a 2-bp deletion in the upstream region of the gene in the two mutants, resulting in a severely truncated polypeptide (57 aa instead of 469 aa), while six point mutations in the other gene did not result in changes in the amino acid sequence. Based on these results, FAD2-2, an endoplasmic reticulum (ER) oleic acid desaturase, is affected in the mutants, resulting in a ~ 7% increase in oleic acid content in comparison to untreated Tamla plants. The induced mutants could be utilized for the development of high oleic oil rapeseed varieties and for regulatory studies of lipid metabolism in seed oils.

Keywords

Brassica napus Oleic acid Fatty acid desaturase 2 (FAD2Mutation Ethyl methanesulfonate (EMS) 

Notes

Acknowledgements

The authors would like to thank Sung-Soog Na for her invaluable contributions to this research. This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ01102303)” Rural Development Administration, Republic of Korea.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Yong-Hwa Lee
    • 1
    • 2
  • Won Park
    • 1
  • Kwang-Soo Kim
    • 1
  • Young-Seok Jang
    • 1
  • Ji-Eun Lee
    • 1
  • Young-Lok Cha
    • 1
  • Youn-Ho Moon
    • 1
  • Yeon-Sang Song
    • 1
  • Kyeongbo Lee
    • 1
  1. 1.Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development AdministrationMuanRepublic of Korea
  2. 2.Division for Korea Program on International Agriculture (KOPIA)Rural Development AdministrationJeonjuRepublic of Korea

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