Relationship between fatty acid composition and starch properties of 30 japonica rice cultivars
Relationship between fatty acid composition and starch properties of 30 japonica rice cultivars
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DOI：
10.1002/cche.10110
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发表时间：
2019-03-01
期刊：
影响因子：
2.4
通讯作者：
Ohtsubo, Ken'ichi
中科院分区：
文献类型：
--
作者：
Nakamura, Sumiko;Katsura, Junji;Ohtsubo, Ken'ichi
背景与目的虽然稻米中脂类的含量不如碳水化合物和蛋白质丰富，但它们对稻米的营养、感官和功能品质有重要作用。在以前的研究中，我们开发了新的估计公式的基础上的碘吸收曲线或糊化特性的淀粉性质。本研究的目的是表征不同水稻品种的脂肪酸组成，并建立基于糊化特性的脂肪酸含量估算公式。结果我们发现，高聚合度的支链淀粉品种表现出较高的Pt，和较高程度的不饱和脂肪酸（USF）（20：0，20：1，22：0和24：0）和低CD的支链淀粉样品表现出较高的亚油酸和亚麻酸含量，而Pt和Cons表现出较低的值。结论建立了基于糊化特性的油酸和亚油酸含量估算公式，校正和验证试验的决定系数（R-2）分别为0.75和0.68，分别为0.65和0.76。
Background and objectives Although lipids are less abundant than carbohydrates and proteins in rice, they are important because they contribute to its nutritional, sensory, and functional qualities. In a previous study, we developed novel estimation formulae for starch properties on the basis of the iodine absorption curve or the pasting properties. The objectives of the present research are to characterize the fatty acid compositions of the various rice cultivars and to develop the estimation formulae for fatty acid contents based on the pasting properties. Findings We found that high degree of polymerization of amylopectin cultivars showed a high Pt, and a higher degree of unsaturated fatty acid (USF) (20:0, 20:1, 22:0 and 24:0) and low CD of amylopectin samples showed a high linoleic and linolenic acid content, while that of Pt and Cons showed a low value. Conclusions We developed novel estimation formulae for oleic and linoleic acid content based on pasting properties, and these equations showed determination coefficients (R-2) of 0.75, and 0.68 for calibration and 0.65, and 0.76 for the validation test, respectively.