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Articles by O. Safo-Kantanka
Total Records ( 3 ) for O. Safo-Kantanka
  E. Baafi and O. Safo-Kantanka
  Trials were conducted at two different locations in the Forest and Transition ecozones of Ghana in 2004 and 2005. The aim was to evaluate the agronomic performance of four elite varieties against four released varieties and to determine GXE effect on selection of varieties for the Forest and Transition ecozones of Ghana. Eight genotypes involving four local elite and four released varieties were used. Data collected include tuber yield, harvest index, dry matter content, cooking quality, flour, starch and gari yields. Data collected were analysed with Analysis of Variance (ANOVA) including the factors genotype, location and year for all the data collected except cooking quality using Costat. The difference method in which experienced but few people are used, was use to rank the cooking quality of the genotypes on a scale of 1 to 4 with 1 as poor and 4 as excellent. Tuber yield was generally higher for the released varieties than the local elite ones. The opposite was true for the dry matter content. Harvest index was in the range of 0.48-0.64. Cooking quality of the local elite varieties was generally better than the released ones The results show differences in response of the agronomic traits of cassava to different environmental conditions. This justifies specific adaptation as a goal for local breeding. It also shows that these traits are genotype dependent. It is therefore, critical that cassava genotypes are screen across the various cassava growing areas to assess their potential usage before its potential for specific use may be recommended.
  E. Baafi and O. Safo-Kantanka
  The influence of age on tuber yield, dry matter content, cooking quality and flour, gari and starch yield were studied on 4 cassava accessions (DMA-002, WCH-037, NKZ-009 and NKZ-015) at six selected locations in the Forest and the Transition ecozones of Ghana in 2004/2005. The aim was to determine the effect of age, variety and location on agronomic and processing characteristics of cassava genotypes at  the  Forest  and  the  Transition ecozones of Ghana. Data were collected for the tuber yield, dry matter content, cooking quality, flour, gari and starch yields. Planting was done at 1x1 m with each genotype occupying half of an acre to facilitate continuous harvesting and for large tuber samples of 25 kg to be processed into flour, gari and starch. Harvesting which began at 12 months after planting was continued monthly until 15 months of age. Tuber yield of the genotypes was generally higher in the Transition than the Forest. In addition, DMA-002 and WCH-037 produced the higher tuber yield than the NKZ-lines in the Transition belt but not in the Forest ecozone. Genotypes did not only vary in dry matter content at the two ecozones but also the age at harvest. Cooking quality of the DMA-002 and WCH-037 was better than the NKZ-lines. Obtained results revealed that the optimum age for root tuber yield did not coincide with that of the flour, gari and starch. Similar observation was made between the starch, flour and gari.
  E. Baafi and O. Safo-Kantanka
  Flour yield and its solubility, swelling power and water-binding capacity from four genotypes of cassava were studied. This was to study the effect and relative importance of age and environment on cassava flour yield and quality. Trials were conducted at six selected districts from the Forest and the Transition ecozones of Ghana. Harvesting was done at monthly intervals from 12th to the 15th month after planting. At each harvest, 25 kg of fresh tubers of each of the genotypes from each location were commercially processed into flour. Flour yield of the genotypes produced at the ecozones across ages at harvest indicated significant genotype by location interaction effect. While solubility and swelling power steadily increased with age, the opposite was true for water binding capacity. Solubility values ranged from 6.89 to 12.00%. That of swelling power and water-binding capacity was 16.55-20.46 g g-1 and 111.92-139.17%, respectively. Significant differences (p< 0.05) were established between the locations for traits studied. Interaction between genotype and locations were also significant (p< 0.05).
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