Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 99, Issue 12, Pages 5384-5391Publisher
WILEY
DOI: 10.1002/jsfa.9798
Keywords
linolenic acid; gamma ray; soybean; fatty acid desaturase; mutation breeding
Funding
- National Research Foundation of Korea [2017M2A2A6A05018538] Funding Source: Medline
- National Research Foundation of Korea [2017M2A2A6A05018538] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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BACKGROUND Soybean seeds contain 18-24% lipids, which are made up of 85% polyunsaturated fatty acids. Two of these (linoleic and linolenic acids) comprise essential fatty acids that are not synthesized in humans and animals. Linolenic acid plays a vital role in the maintenance of brain function and is a source of docosahexaenoic acid for retinal and nerve tissue, with its physiological functions being a focus of attention. RESULTS We developed mutant soybean populations via gamma irradiation of Korean cultivars Danbaek and Daepung and evaluated the linolenic acid content of 78 and 154 M-9 mutant progenies. We selected the four mutant lines with the highest linolenic acid contents based on 2 years of investigation of fatty acids. The selected mutant lines had linolenic acid contents that were 33.9% to 67.7% higher than those of the original cultivars and exhibited increased fatty acid desaturase (FAD) gene expression levels during seed development. We also identified nucleotide polymorphisms of FAD genes in the four mutant lines. CONCLUSION The present study found that linolenic acid content is related to significantly increased expression levels of the FAD3C and FAD3D genes in the endoplasmic reticulum, which was uncovered by radiation mutation breeding of soybean. (c) 2019 Society of Chemical Industry
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