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Articles by S.K. Nutsugah
Total Records ( 2 ) for S.K. Nutsugah
  I. Sugri , S.K. Nutsugah , A.N. Wiredu , P.N.T. Johnson and D. Aduguba
  Sweet potato is an important crop in the upper-east region of Ghana due to its adaptive ability on poor quality soils. It is a predominant snack and lunch for children during the peak harvest period, around October-February. This study assessed the influence of some sensory descriptors, with emphasis on the emerging influence of colour, on consumer taste preference. Boiled and fried samples of 7 cultivars were assessed by 57 taste panelists using a five-point hedonic score for taste, colour, flavour, texture, mouth-feel and overall acceptability. A further questionnaire on consumers’ first-choice preference and reasons for preference was administered. Kendall’s concordance analysis was performed to test the null hypothesis of independence between variables. Critical descriptors influencing consumer preference were orange-flesh (20.8%), mild flavour (20.8%), soft texture (20.8%) and hard texture (16.7%). Up to 24.1 and 21.8% of data variation when boiled and 24.2 and 28.5% when fried were associated with sweetness and soft texture, respectively. Cinkanse-Abiga showed distinct orange-fleshed colour score (3.9) followed by Cinkanse-Naabug (3.3) whiles the other varieties recorded a near-white colour (1.3-1.4). Overall scores for preference (%) were Purupuru (12.8), Obare-red (15.8), Obare-white (10.5), Kuffour (8.8), Cinkanse (12.3), Cinkanse-Abiga (31.6) and Cinkanse-Naabug (8.8). Kendall’s concordance coefficients showed this order of preference: Cinkanse-Abiga (5.9), Purupuru (4.74), Kuffour (4.68), Obare-white (4.6), Obare-red (4.2), Cinkanse (2.8) and Cinkanse-Naabug (2.5). Sensory descriptors of the most preferred varieties (Cinkanse-Abiga and Purupuru) were starchy-soft texture requiring little chewing, strong flavour and good mouth-feel. Thus, orange-fleshed cultivars which combine these attributes would be appealing to consumers of wide diversities.
  S.K. Nutsugah , J.K. Twumasi , J. Chipili , Y. Sere and S. Sreenivasaprasad
  The present study describes the outputs of a collaborative research programme funded by the UK`s Department for International Development-Crop Protection Program to investigate the genetic (lineages) and pathogenic (pathotypes) diversity of the blast fungus populations and characterize the key sites suitable for resistance screening. Seventy-one Magnaporthe grisae isolates were collected from seven regions where rice is grown, representing blast populations in Ghana. Following molecular characterization, these isolates were grouped into four distinct lineages designated as GH-1, GH-2, GH-3 and GH-4 and 25 pathotypes. GH-1 was the major lineage comprising 52% of all the isolates and was present across the country on up to 24 rice cultivars. GH-2 comprising of 30% of the isolates sampled was restricted in distribution mainly from Hohoe area on up to seven cultivars. GH-3 consisted of six isolates from Western, Eastern and Central Regions while GH-4 consisted of two isolates from Nyankpala in Northern Region. Occurrence of blast pathogen on wild rice and weed hosts has been observed and their potential impact needs to be considered in blast/weed management. Baseline data new to Ghana on the diversity and distribution pattern of the blast pathogen populations have been established and key sites identified. Adaptive research is continuing to develop technologies suitable for long-term pathogen monitoring, identify sources of resistance and develop appropriate blast management strategies.
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