A Comparative Study and Determination of Glycemic Indices of Three Yam Cultivars (Dioscorea rotundata, Dioscorea alata and Dioscorea domentorum)

Authors

  • N.C. Ihediohanma Department of Food Science and Technology, Federal University of Technology, Owerri, Imo State, Nigeria
  • N.C. Onuegbu Department of Food Science and Technology, Federal University of Technology, Owerri, Imo State, Nigeria
  • A.I. Peter-Ikechukwu Department of Food Science and Technology, Federal University of Technology, Owerri, Imo State, Nigeria
  • N.C. Ojimba Department of Food Science and Technology, Federal University of Technology, Owerri, Imo State, Nigeria

DOI:

https://doi.org/10.3923/pjn.2012.547.552

Keywords:

Glucose, glycemic index, glycemic response(s), IAUC, three-leaved yam, water yam, white yam

Abstract

The Glycemic Indices (GI) of three yam cultivars commonly consumed in Nigeria were studied. The yam cultivars were white yam (Dioscorea rotundata Poir), water yam (Dioscorea alata) and three-leaved yam (Dioscorea domentroum). Five normal (healthy) volunteers participated in the study. GI was determined using a standard method with glucose as the reference food. Fifty (50) gram available carbohydrate portions of the yam cultivars were analyzed for proximate composition and dietary fiber by enzymatic-gravimetric method. The mean IAUCs (glycemic responses) for the test foods and glucose ranged from 863.5-3642.84 and were significantly different. Expectedly, glucose had the highest glycemic response of 3642.84. The mean IAUC for white yam, water yam and three-leaved yam were 2386.50, 863.50 and 1929.08 respectively. The GI of white yam (67) and three-leaved yam (56) were significantly higher than that of water yam (24). It was concluded that white yam and three-leaved yam are intermediate or medium glycemic food, whereas water yam is a low GI food.

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Published

15.05.2012

Issue

Vol. 11 No. 6 (2012)

Section

Research Article

License

Copyright (c) 2012 Asian Network for Scientific Information

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

How to Cite

Ihediohanma, N., Onuegbu, N., Peter-Ikechukwu, A., & Ojimba, N. (2012). A Comparative Study and Determination of Glycemic Indices of Three Yam Cultivars (Dioscorea rotundata, Dioscorea alata and Dioscorea domentorum). Pakistan Journal of Nutrition, 11(6), 547–552. https://doi.org/10.3923/pjn.2012.547.552

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