Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Comparison of protein and amino acid content in selected cultivars of non-glutinous rice in Korea

  • So-Jung, Kim (Marine Industry Research Institute for East sea rim) ;
  • Min Joo, Kim (Marine Industry Research Institute for East sea rim) ;
  • Su Hyeon, Lee (Marine Industry Research Institute for East sea rim) ;
  • Youngmin, Choi (Department of Agro-Food Resources, NAAS, RDA) ;
  • Sung, Jeehye (Korea Department of Food Science and Biotechnology, Andong National University) ;
  • Dongwon, Seo (Food Analysis Center, Korea Food Research Institute)
  • Received : 2021.10.12
  • Accepted : 2021.11.29
  • Published : 2021.12.01
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Abstract

The objective of this study was to determine amino acid and protein contents of brown and milled non-glutinous rice of 13 cultivars in Korea. Protein contents of MRs (milled rices) were in order of Haepum (7.27%) > Hanareum No. 4 (7.14%) > Odae (6.84%). Protein contents of BRs (brown rices) were in order of Haepum (7.68%) > Odae (7.63%) > Hanareum No. 4 (7.60%). The amino acid content was the highest in Haepum (MR 5.76%, BR 6.49%), followed by Haedeul (MR 5.71%, BR 6.30%), and Odae (MR 5.63%, BR 6.29%). The essential amino acid contents of non-glutinous rices were in order of Haepum (MR 2.34%, BR 2.57%) > Haedeul (MR 2.31%, BR 2.48%) > Odae (MR 2.20%, BR 2.56%). The contents of amino acid and protein in BRs were considerably higher than those in MRs. Protein and most of amino acid contents were higher in Haepum than the other cultivars. The certificated reference material (CRM) 1849a (infant/adults nutritional formular) from National Institute of Standard and Technology (NIST) was used as the test sample to determine the precision and accuracy of the analytical method. The regression analyses revealed good correlations (correlation coefficient), greater than 0.99. The recovery values of the amino acids ranged from 93.17 to 99.59%. The limit of detection (LODs) ranged from 0.01 - 0.07 mg·100 g-1 and the limit of quantitation (LOQs) ranged from 0.03 - 0.21 mg·100 g-1 for all analytes.

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Acknowledgement

본 연구는 2018 - 2022년 농촌진흥청 연구개발사업(과제명; PJ01339704)의 지원에 의해 수행되었으며 이에 감사드립니다.

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