The Optimization of Production of Instant Pounded Yam Flour Using Cultivars of White Yam (Dioscorea rotundata)

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Olusola Fatimah Olagunju-Yusuf
Abdul-Razak Adebowale
Olajide Sobukola
Lateef Sanni


Background and Objective: Instant pounded yam dough obtained from instant pounded yam flour (IPYF), is an emerging alternative to pounding boiled yams. IPYF dough that possesses similar organoleptic properties with conventional pounded yam (CPY) is of high demand in the West Africa market. The objective of this study was to produce IPYF dough of similar qualities to the CPY through optimization technique in other to enhance its marketability value.

Methodology: The study optimized IPYF samples obtained from three white yams (Dioscorea rotundata) cultivars (Efuhu, Dariboko and Aro) that were pre-treated (using blanching and steam method) and dried (using cabinet and oven driers). General factorial optimization design was utilized using pasting properties response of IPYF samples. Hedonic and Degree of difference sensory evaluation were conducted on the selected optimized IPYF and CPY samples using nine and seven points scales respectively.

Result: The selected optimized sample was Dariboko pre-treated with steam and dried using cabinet drier with 0.63 desirability value. A mean score of 7.4:7.5, 6.8:8.5, 7.2:8.5, 7.3:8.5, 6.0:8.5, 7.3:8.5, 7.2:8.5, 6.8:8.5 and 7.4:7.5 was obtained correspondingly for cohesiveness, smoothness, springiness, adhesiveness, hardness, stretch ability, taste, mouth feel, aroma and overall acceptability for the optimized IPYF sample and CPY. Scores for these attributes indicated that the optimized IPYF sample was acceptable. The degree of difference test showed that CPY was not significantly different from optimized sample in terms of smoothness, stretch ability, adhesiveness and mouth feel.

Conclusion: This demonstrates that this sample can easily pass as pounded yam has it possess important similarities with conventional pounded yam.

Instant pounded yam flour, conventional pounded yam, general factorial optimization, sensory evaluation.

Article Details

How to Cite
Fatimah Olagunju-Yusuf, O., Adebowale, A.-R., Sobukola, O., & Sanni, L. (2019). The Optimization of Production of Instant Pounded Yam Flour Using Cultivars of White Yam (Dioscorea rotundata). Asian Food Science Journal, 13(4), 1-9.
Original Research Article


Verter N, Bečvářová V. An Analysis of yam production in Nigeria. Acta Universitatis Agriculturae et Silviculturae. Medelianae Brunensis. 2015;63(2):659-665.

Ekwu FC, Ozo NO, Ikegwu OJ. Quality of Fufu Flour from White Yam Varieties (Dioscorea spp). Nigerian Food Journal. 2005;23:107-113.

Akissoe NH, Hounhouigan JD, Bricas N, Vernier P, Nago MC, Olorunda OA. Physical, Chemical and Sensory Evaluation of Dried Yam (Dioscorea rotundata) tubers, flour and amala – A flour-derived product. Tropical Science. 2001;41:151-156. Available:

Ajibosin IO, Daoudu MA, Omotade SA, Komolafe AO. “Capacity Building for Instant Poundo Yam Flour Production”. Nigerian J. of Info. Stud. 2005;4(4):1-5. In: Ayodeji SP, Abioye TE.. Development and Performance Evaluation of a Parboiling Machine for Poundo - Yam Flour Processing Plant. Journal of Emerging Trends in Engineering and Applied Science (JETEAS). 2011;2(5):853-857. [ISSN:2141-71016] Available:

Otunola ET, Ogunbiyi RS. Preliminary Studies On The Microbiological and Physiochemical Characteristics of Fermented Pounded Yam. Journal of Nutrition and Food Science. 2005;35(3): 135-142. Available:

Ayodeji SP, Abioye TE. Development and Performance Evaluation of a Parboiling Machine for Poundo - Yam Flour Processing Plant. Journal of Emerging Trend in Engineering and Applied Science. (JETEAS). 2011;2(5):853-857.

Wiesenborn DP, Orr PH, Casper HH, Tacke BK.. Relationship between Potato Starch Paste Behavior and Selected Physical/Chemical Properties. Journal of Food Science. 1994;58:644–648. Available:

Kim YS, Wiesenborn DP, Orr PH, Grant LA.. Screening Potato Starch for Novel Properties using Differential Scanning Calorimetry. Journal of Food Science. 1995;60:1060-1065.

Moorthy SN. Physicochemical and Functional Properties of Tropical Tuber Starches. Staerke. 2002;54:559-592. Available:<559::AID-STAR2222559>3.0.CO;2-F

Otegbayo BO, Aina J, Asiedu R, Bokanga M. Microstructure of boiled yam (Dioscorea spp.) and its implication for assessment of textural quality. Journal of Texture Studies. 2005;36:324-332. Available:

Otegbayo BO, Aina J, Asiedu R, Bokanga M. Pasting characteristics of fresh yams (Dioscorea spp.) as indicators of textural quality in a major food product- ‘pounded yam’. Food Chemistry. 2006;99:663-669. Available:

Akinwande BA, Abiodun OA, Adeyemi IA, Akanbi CT. Effect of Steaming Method and Time on the Physical and Chemical Properties of Flour from Yam Tubers. Nigeria Food Journal. 2008;28(2):49-56. Available:

Rapid Visco Analyzer. Instruction Manual for the Super 3 Rapid Visco Analyzer, Australia: Newport Scientific Pty, Limited. ½ Apollo Street, Warriewood NSW 2102. 2003;17-19.

Myers R, Montgomery DC. Response Surface Methodology: Process and Product Optimization Using Designed Experiments 2nd ed Wiley, New York; 2002.

Da Silva P, Moreira F. Vacuum Frying of High Quality Fruit and Vegetable-Based Snacks. LWT. Food Science and Technology. 2008;41(10):1758-1767.

Meilgaard MC, Civille GV, Carr BT. Sensory Evaluation Techniques. 3rd Edn., New York; CRC Press Boca Raton; 1999. [ISBN: 1420005561, 9781420005561]

Coursey DG. Yams. Longman, Group Ltd, London, Tropical Agricultural Series. 1967; 22:256-257.

Oluwamukomi MO, Adeyemi AO. Physico-chemical, Pasting and Sensory Properties OF Poundo-Yam enriched with Defatted Soy Flour. Applied Tropical Agriculture. 2005;20(1):89-95.

Oduro I, Ellis WO, Aryeetey SK, Ahenkora K, Otoo JA. Pasting Characteristics of Starch from New Sweet Potato. Tropical Science. 2000;40:25-28.
DOI: 20016787527

Babajide JM. Henshaw FO, Oyewole OB. Effect of Yam Variety on Pasting Properties and Sensory Attributes of Traditional Dry-Yam and its Products. Journal of Food Quality. 2008;31:295-305.