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논문 기본 정보

자료유형
학술저널
저자정보
이영상 (순천향대학교) 김규원 (공주대학교) 박용진 (공주대학교)
저널정보
한국육종학회 Plant Breeding and Biotechnology Plant Breeding and Biotechnology Vol.8 No.4
발행연도
2020.1
수록면
341 - 353 (13page)

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초록· 키워드

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To understand genetic diversity in nutritional properties, 157 accessions of Korean-bred rice varieties were cultivated in3 separate fields and harvested brown rice were used for determination of tocopherols (T), tocotrienols (T3), squalene (SQ), campesterol(CA), sitosterol (SI), and stigmasterol (ST) contents as well as fatty acid compositions. The average contents of α-T, γ-T, α-T3, γ-T3,SQ, CA, SI, and ST were 11.9, 1.6, 10.0, 13.9, 35.2, 42.1, 163.5, and 20.0 μg/g, respectively, and total tocols, SQ, and total phytosterolscontents ranged 26.8-54.9, 7.9-78.4, and 162.9-320.2 μg/g, respectively. Ecotype of rice significantly affected phytonutrient contentsin that japonica-type showed significantly higher α-T and α-T3 contents and α-T/γ-T, α-T3/γ-T3, and T/T3 ratios compared to indicatypevarieties. Total T, SQ and ST contents were also higher in japonica-types, while total T3, CA and SI contents were not affected byecotypes. Linoleic, oleic, and stearic acids were the 3 major fatty acids consisting 36.5, 35.8, and 22.9% of total fatty acids, respectively. Positive correlationships were observed among 3 phytosterols, while oleic acid showed negative correlation with palmitic (r = ‒0.662**)and linoleic (r = ‒0.810**) acids. Partial least squares discriminant analysis (PLS-DA) revealed that phytonutrient profiles mayeffectively differentiate rice ecotypes, and α-T3/γ-T3, γ-T and α-T3 contents were the key components with highest variable importancein projection (VIP) scores. All these results showed diverse genetic and ecotype-dependent variations in phytonutrients inKorean-bred rice varieties, which can be further used for developing a superior rice variety with higher nutritional value.

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