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http://dx.doi.org/10.7732/kjpr.2013.26.1.009

Comparison of Nutrient Composition of Yacon Germplasm  

Kim, Su Jeong (Highland Agriculture Research Center, NICS, RDA)
Jin, Yong Ik (Highland Agriculture Research Center, NICS, RDA)
Nam, Jeong Hwan (Highland Agriculture Research Center, NICS, RDA)
Hong, Su Young (Highland Agriculture Research Center, NICS, RDA)
Sohn, Whang Bae (Highland Agriculture Research Center, NICS, RDA)
Kwon, Oh Kuen (Highland Agriculture Research Center, NICS, RDA)
Chang, Dong Chil (Highland Agriculture Research Center, NICS, RDA)
Cho, Hyun Mook (Highland Agriculture Research Center, NICS, RDA)
Jeong, Jin Cheol (Highland Agriculture Research Center, NICS, RDA)
Publication Information
Korean Journal of Plant Resources / v.26, no.1, 2013 , pp. 9-18 More about this Journal
Abstract
The aim of this study is to provide the basic data for yacon [Samallanthus sonchifolius (Poepp. & Endl.) H. Robinson] in dietary food. The nutritional compositons, such as protein, ash, carbohydrate, dietary fiber, vitamin and fructooligosaccharide, were analyzed for 4 yacon germplasm lines. Yacon has low calories with only 46~56 kcal/100 g. The contents of water, fat, ash, protein, carbohydrate and dietary fiber were ranged 85.9~86.8%, 0.1~0.2%, 0.2~0.3%, 0.5~0.7%, 12.2~13.1% and 1.05~1.14%, respectively. The iodine-starch test did not show any color or precipitation reaction, which indicates that yacon has no starch content. However, in the absence of starch, yacon is rich in fluctooligosaccharide, which is between 9.6~11.1%. Maltose is present in the larger amount, followed by sucrose, glucose, and fructose in terms of free sugars. The analysis of minerals revealed that yacon contains potassium in the larger amount of 141~176 mg/100 g F.W., followed by magnesium at 8.2~10.6 mg, calcium, and sodium representing the least present mineral. Yacon proved to have a total of 17 types of amino acids, which are between 404.0~581.8 mg per 100 g of yacon. Glutamic acid, the main sweetening component, is present in the large amount of 94.0~182.2 mg/100 g F.W., followed by aspartic acid, arginine, and alanine. The proportion of the essential amino acid was 24.8~33.6%. Results of analysis also showed that yacon contains 0.001~0.024 mg, 0.03~0.11 mg, 0.02~0.3 mg, 0.3~0.4 mg and 14.1~20.6 mg of ${\beta}$-carotene, thiamin, riboflavin, niacin, and ascorbic acid, respectively. It is also likely to be highly used as functional food material in the future because it is abundant in both fluctooligosaccharide and antioxidants which are important functional components.
Keywords
Fructooligosaccharides; Root crop; Tuberous root; Yacon; Smallanthus sonchifolius;
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Times Cited By KSCI : 8  (Citation Analysis)
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