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Publication Type
Journal Article
UWI Author(s)
Author, Analytic
McAnuff, M. A. ; Omoruyi, F. O. ; Sotelo-Lopez, A. ; Asemota, Helen N
Author Affiliation, Ana.
Department of Basic Medical Sciences
Article Title
Proximate analysis and some antinutritional factor constituents in selected varieties of Jamaican yams (Dioscorea and Rajana spp.)
Medium Designator
n/a
Connective Phrase
n/a
Journal Title
Plant Foods for Human Nutrition
Translated Title
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Reprint Status
n/a
Date of Publication
2005
Volume ID
60
Issue ID
2
Page(s)
93-8
Language
eng
Connective Phrase
n/a
Location/URL
n/a
ISSN
0921-9668 (Print)
Notes
n/a
Abstract
Two wild (Dioscorea polygonoides and Rajana cordata) and seven cultivated varieties of Jamaican yams (Dioscorea spp.) were analyzed for their proximate composition and the levels of antinutritional factors. The protein level range was 47.8 +/- 2.6 to 88.0 +/- 2.5 g/kg dry weight. The lowest level was seen in D. cayenensis. The range for the dietary fiber content in the tubers was 16.3 +/- 0.7 to 63.5 +/- 0.4 g/kg dry weight. The wild yam varieties recorded higher levels. Saponins level was <600 mg/kg dry weight in all the tubers analyzed except for bitter yam (2962.5 +/- 60.5 mg/kg dry weight). Total phenol content ranged from 1.3 +/- 0.1 to 79.3 +/- 6.1 g/kg while total condensed tannin content ranged from 0.1 +/- 0.0 to 26.7 +/- 3.8 g/kg dry weight. Samples that showed high levels of phenols also had high levels of condensed tannins. All the samples analyzed contained low levels of lectins and no alkaloids were detected. The levels of antinutritional factors did not clearly delineate the wild varieties from the edible varieties....
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