국내 육성된 향미 품종의이앙시기별 이화학적 특성 및 향기성분 비교 분석
Physicochemical Characteristics of Cultivated Aromatic Rice Germplasm and Comparative Analysis of Flavor Components During Transplanting Time
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초록
1. 본 연구의 향미의 품종별, 이앙시기별 이화학적 특성평가한 결과 품종간의 차이는 나타나지 않았으며 단백질 함량은 5.8~7.3% 로 나타났고 5월 22일 조기이앙시 평균 6.4% 로 가장 낮았으며 지방 함량은 조기이앙시 평균 2.6±0.1%, 보통기이앙시 평균 2.5±0.1%, 만기이앙시 평균 2.2±0.1%를나타내어 이앙시기가 빠를수록 높은 경향을 나타내었다. 2. 향미 품종 중 Hyangmibyeo 2 ho가 강하점도의 값이152.3RVU로 가장 높아 전분의 구조가 호화되기 쉬운 구조적특성을 가지고 다른 품종에 비해 밥맛이 우수 할 것으로 판단되며 이앙시기는 조기나 보통기 이앙이 좋을 것으로 판단된다. 3. 향미 품종, 이앙시기별 향기성분 정량 분석 비교에서는향기성분 등 중 대표적으로 2-acetyl-1-pyrroline (2AP)를지표성분으로 정하여 정량분석 한 결과 품종 중에는 Aromi 가 41.7~66.7 μg/100 g으로 가장 높은 2AP의 함량을 나타내었고 이앙시기의 영향은 모든 품종에서 각각 보통기이앙시평균 37.4 μg/100 g, 만기이앙시 31.5 μg/100 g, 조기이앙시 평균 37.4 μg/100 g 순으로 나타났다. 최적 이앙시기는생산력 검정 등의 다양한 요소를 고려해 볼 때 6월 5~20일사이에 이앙하는 것이 최적으로 판단된다.
Abstract
BACKGROUND:The Aromatic rice which is characterized by the flavor ofNurungjiwhen cooked rice, and consumption is increasing recently. The purpose of this study was to investigate the physicochemical characteristics and aroma components of five aromatic rice cultivars according to transplanting time. METHODS AND RESULTS: Quantitative analysis of protein, fat, fatty acid and essential amino acid for five aroma rice cultivars(Hyangmibyeo 2 ho, Aromi,Mihyang, Aranghyangchal, Heughyang)and transplanting time was analyzed by crude protein analyzer, gas chromatography (GC), liquid chromatography (LC) and viscosity analysis was done by using rapid viscosity analyzer (RVA). The content of 2-acetyl-1-pyrroline (2AP) was determined by gas chromatography mass spectrometer. (GC-MS) As a result, the average protein and lipid contentswere 6.5%and 2.4%, respectively. The content of essential amino acid showed the highest content at 104.4mg/g. There was no significant change in normal nutrients during the transplanting time. ByRVA, cv.Hyangmibyeo 2 ho showed the highest peak and total setback viscosities and lowest breakdown viscosity in early transplantation. The content of 2AP in flavor varieties and transplanting time was quantitatively analyzed by GC-MS. Among the cultivars, Aromi showed the highest 2AP contents at 66.7 μg/100gin normal transplanting time. CONCLUSION: cv.Aromi and Hyangmibyeo 2 ho were excellent physicochemical properties and 2AP components contentsamongaromatic rice cultivars tested. Theiroptimaltime to transplant was at the beginning of June in the area ofMiryang.
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