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Publication Type
Journal Article
Author, Analytic
Riley, C. K. ; Bahado-Singh, Perceval S. ; Wheatley, Andrew. O. ; Ahmad, Mohammed H. ; Asemota, Helen. N.
Author Affiliation, Ana.
n/a
Article Title
Relationship between the physicochemical properties of starches and the glycemic indices of some Jamaican yams (Dioscorea spp.)
Medium Designator
n/a
Connective Phrase
n/a
Journal Title
Mol Nutr Food Res
Translated Title
n/a
Reprint Status
n/a
Date of Publication
2008 Nov
Volume ID
52
Issue ID
11
Page(s)
1372-6
Language
eng
Connective Phrase
n/a
Location/URL
ISSN
1613-4133 (Electronic)
Notes
n/a
Abstract
Starch granules from round leaf yellow yam (RY), Lucea yam (LY), white yam (WY), and Chinese yam (CY) grown in Jamaica were isolated and the relationship between starch amylose content, crystallinity, microscopic properties, in vitro digestibility, and the glycemic index (GI) of the tubers was investigated. The results indicate that RY had the highest amylose content (265.30 +/- 0.09 g/kg starch) while CY the lowest (111.44 +/- 0.03 g/kg starch). A corresponding variation in starch digestibility and GI was also observed, as CY which had the highest in vitro digestibility had the highest GI (21.27 +/- 0.01 and 97.42 +/- 0.62%, respectively), while RY, LY, and WY starches with low digestibility had lowest GI. Differences in the crystalline pattern of the different starches were observed, where RY, LY, and WY displayed the type B crystalline pattern while CY had the intermediate crystallite (type C).....
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