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Journal of Agronomy
Year: 2007  |  Volume: 6  |  Issue: 4  |  Page No.: 581 - 585

Effect of Genotype, Age and Location on Cassava Starch Yield and Quality

E. Baafi and O. Safo-Kantanka    

Abstract: Trials were conducted at 6 selected districts in the Forest and Transition ecozones of Ghana to determine the influence of age and location on cassava starch yield and its physicochemical and functional properties. Four elite varieties-NKZ-009, NKZ-015, DMA-002 and WCH-037 were used. Harvesting was done from 12 to 15 months on monthly interval. Twenty five kilogram of fresh tubers from each genotype were commercially processed into starch. This was done by women trained by Women In Agricultural Development (WIAD) in agro-processing at their local factory at Ashanti Mampong. Samples were analysed at the Plant breeding Laboratory of Kwame Nkrumah University of Science and Technology for their physicochemical and functional properties-solubility, swelling power and water-binding capacity. Starch yield was analysed using line graphs with Excel. Data from the physicochemical and functional properties were analysed using the analysis of variance (ANOVA) in a split-split plot design with location as main plot, genotype as subplot and age as the sub-subplot. The peak starch yield was generally at 13 months for all the varieties except for NKZ-015 in the Transition belt. Solubility generally increase with age with the lowest (7.29%) and highest (8.63%) being recorded at 12 and 15 month, respectively. Swelling power peaked at 13 months but water-binding capacity decreased with age and the interaction between age and genotype and location was significant for all the three functional properties.

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