(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170


Pages: 175-178
S. M.Tongu, C. U. Agubuzu and M. S.Iorungwa

keywords: Dioscoreabulbifera, Dioscorearotundata, mineral composition, proximate composition


This study compared the nutritional values of Dioscorearotundata and Dioscoreabulbifera grown in Agboughul village nearby Makurdi, Benue State, Nigeria. Samples of the Dioscoreaspecies were collected and analyzed for their proximate and mineral compositions. The results of analyses revealed thatDioscoreabulbiferawas richer in protein (3.79%), ash content (2.60%), crude fibre (1.75%) and moisture content (60.13%) than Dioscorearotundata while the Dioscorearotundata was richer in crude fat (1.80 %) and carbohydrate (89.75%) than Dioscoreabulbifera. In terms of mineral composition in mg/100g, Dioscoreabulbifera was richer than Dioscorearotundata in macro minerals such assodium (100.5), potassium (975.0), calcium (103.0), and magnesium (65.0) while the values of micro elements; zinc (1.5), iron (5.0) and manganese (0.6) were all higher inDioscorearotundata but the value of copper was the same (0.2) in both species. The values of metabolizable energy in kJ/100g were 1605.97 and 1646.92 for Dioscoreabulbifera and Dioscorearotundata, respectively. The adoption of Dioscoreabulbifera as staple food is recommended.


Adeogun OO, Adekunle AA, Samuel OT& EbabhiAM 2014.Studies on fungi isolated from Dioscorearotundata (yam) collected from open markets in Lagos, Nigeria. Int. J. Phytopath.,3(3): 139-147. AfiukwaCA & Igwe DO 2015. Comparative nutritional and phytochemical evaluation of the aerial and underground tubers of air potato (Dioscoreabulbifera) available in Abakaliki, Ebonyi State Nigeria.British J. Appl. Sci. & Techn., 11(4): 1-7. AkinniyiJA & Waziri M 2011.Proximate value and mineral content of the shoot of Barassusaethiopummart(Giginya).J. Chem. Soc. Nig.,36(1): 10-14 Alinnor IJ & Akalezi CO 2010.Proximate and mineral compositions of Dioscorearotundata(white yam) and Colocasiaesculenta(white cocoyam).Pak. J. Nutr.,9(10): 998-1001. Amani NG, Buléon A, Kamenan A & Colonna P 2004.Variability in starch physicochemical and functional properties of yam (Dioscoreaspp.) cultivated in Ivory Coast. J. Sci. Food & Agric., 84: 2085-2096. AOAC (Associationof Official Analytical Chemists) 1990. Official Methods of Analysis, 15th Ed., Vol. 1, Washington DC. Atasie VN, Akinhanmi TF & Ojiodu CC 2009.Proximate analysis and physico-chemical properties of groundnut (Arachishypogaea L.). Pak. J. Nutr.,, 8: 194-197. Celestine AA & David OI 2015.Comparative nutritional and phytochemical evaluation of the aerial and underground tubers of air potato (Dioscoreabulbifera) available in AbakalikiEbonyi State Nigeria.British Journal of Applied Science & Techn., 11(4): 1-7. Ejembi D, Sanni M, Emmanuel TF &Abbah OC 2014.Evaluation of the biochemical composition and proximate analysis of indomie noodle.Int. J. Med. & Appl. Sci.,3(1): 166 – 175. FAO 2003.Food energy - methods of analysis and conversion factors. Report of a Technical Workshop, Rome, 3-6 December 2002. http://www.fao.org/docrep/006/y5022e/y5022e04.htm. Accessed 23/2/2016. IorungwaMS, OrsarTT & TonguSM 2016.Chemical analysis of food and mineral nutrients in seeds and pods of Mucunapruriens (velvet beans).Ewemen J. Herbal Chem.& Pharmac. Res.,2(2): 38-42. JSTOR 2005.Dioscoreabulbifera Linn. [family DIOSCOREACEAE]http://plants.jstor.org/stable/history/10.5555/al.ap.upwta.1_1376. Accessed 29/12/2016 LABCONCO 2005.A guide to Kjeldahl nitrogen determination methods and apparatus.http://www.expotechusa.com/catalogs/labconco/pdf/KJELDAHLguide.PDF. Accessed 2/11/2016 Martin KDJE, Soumaila D, Simplice TG & Lucien PK2010.Effects of post-harvest storage on some biochemical parameters of different parts of two yams species (Dioscoreaspp).Afri. J. Food Sci.& Techn.,1(1): 1-9. New World Encyclopedia 2008.Yam.www.newworldencyclopedia.org/entry/yam. Accessed on 15/12/2015. LibraMA, GonnetyJT, AhiAP, DabonneS, AhipoED &KouameLP 2011.Physicochemical changes in bulbils of two cultivars of Dioscoreabulbifera during the ripening period. Advance J. Food Sci. & Techn., 3(5): 327-331. OgbonnaMC, KorieochaDS, OnyenobiVO & NjokuSC 2011. Profitability of minituber seed yam production technique in south east agro-ecological zone: Evidence from Abia State. J. Agric.&Social Res., 11(2): 113 – 119. OkigboRN & OgbonnayaUO 2006.Antifungal effects of two tropical plant hafextracts (Ocimumgratissimum and Aframomummelegueta) on postharvest yam (Dioscoreaspp).African J. Biotech., 5(9): 727 – 731. OkoAO, UbiBE, EfisueAA & Dambaba N2012.Comparative analysis of the chemical nutrient composition of selected local and newly introduced rice varieties grown in Ebonyi State of Nigeria.Int. J. Agric.&Forestry, 2(2): 16-23. Omoruyi FO 2008. Jamaican bitter yam sapogenin: Potential mechanisms of action in diabetics. J. Plant Foods and Human Nutr., 63(3):135-140. Polycarp D, Afoakwa EO, Budu AS & Otoo E 2012.Characterization of chemical composition and anti-nutritional factors in seven species within Ghanaian yams.Int. Food Res. J., 19 (3): 985-992. Salawu MB, Ibrahim AG, Lamidi LO, SalauMA &OgunleyeBT 2014.Economic analysis of yam processing in Oyo State.European J. Bus.&Mgt., 6(39): 25 – 30. SanfulRE, Oduro I & Ellis WO 2013.Proximate and functional properties of five local varieties of aerial yam (Dioscoreabulbifera) in Ghana.Middle-East J. Scientific Res., 14(7): 947-951. ShajeelaPS, Mohan VR, JesudasLL &Tresina P2011.Nutritional and antinutritional evaluation of wild yam (Dioscorea spp.) [Evaluacióndel valor nutricionalyfactoresantinutricionales de Dioscorea spp. Silvestre]. Tropical & Subtropical Agroecosys., 14:723-730. SoetanKO, OlaiyaCO &OyewoleOE 2010. The importance of mineral elements for humans, domestic animals and plants: A review. Afri. J. Food Sci., 4(5) 200-222. Subhash C, Sarla S, AbhayMP &Anoop B2012.Nutritional profile and phytochemical screening of Garhwal Himalaya medicinal plant Dioscorea bulbifera.Int. Res. J. Pharmacy, 3(5): 289 – 294. Ukom AN, Ojimelukwe PC, Ezeama CF, Ortiz DO & Aragon II 2014. Proximate composition and carotinoid profile of yams and cocoyam root tubers in Nigeria. Amer. J. Food and Nutr., 4(1): 1-10. Wikipedia 2016a.Yam (vegetable).https://en.wikipedia.org/wiki/Yam_(vegetable). Accessed 22/2/2016. Wikipedia 2016b.Mineral (nutrient),https://en.wikipedia.org/wiki/Mineral_(nutrient). Accessed 29/12/16.