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Articles by O. Safo-Kantanka
Total Records ( 2 ) for O. Safo-Kantanka
  I.K. Addai and O. Safo-Kantanka
  The following three soybean genotypes: Gmx 92-6-10, Gmx 92-5-4E and TGX. 87D1303 were subjected to 0, 50, 00, 50, 00, 50 or 300 Gy of 60Co gamma irradiation at the Ghana Atomic Energy Commission, Kwabenya and sown at the Arable Crops Research Farm of Kwame Nkrumah University of Science and Technology, Kumasi, Ghana to study their dosage response. The 250 Gy dose (LD50 ) reduced both percentage emergence and seedling height by about 50% relative to the 0 Gy dose which served as the control and was therefore used as the dosage appropriate for induced mutations for the genotypes. The bulk of the seeds from the three genotypes were irradiated using the 250 Gy dose and variants from the M2 and M3 generations screened by storing either threshed seeds (Category A) or unthreshed seeds (Category B) at a temperature range of 22-25°C and relative humidity of 30-35% on laboratory wooden shelves for 4 months. Variants which had 80% germination or above after the storage period were selected and considered as putative mutants. Improvement in storability created through mutagenesis was calculated as gain in selection expressed as the difference in the mean percentage germination of the M3 and M2 populations (M3-M2). Genotype Gmx 92-6-10 produced the largest proportion of variants with improved storability particularly at the M2 generation whilst TGX 87D-1303 produced the highest gain in selection at the M3 generation. Variability associated with Category A was higher than that by Category B and this gave room for selecting many variants with improved storability from Category A.
  E. Baafi and O. Safo-Kantanka
  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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