Principal components analysis and age at harvest effect on quality of gari from four elite cassava varieties in Ghana

Four elite cassava varieties in Ghana released under the local names Afisiafi, Tekbankye, Abasafitaa and Gblemoduade were planted in June and harvested the following year at 9, 10, 11, 12, 13, 14 and 15months after planting, and processed into gari. The effect that age at harvest had on selected physicochemical properties indicative of gari quality was studied in the four varieties. The parameters studied include moisture content, ash, pH, titratable acidity (% lactic acid), crude fibre, swelling capacity and yield. Moisture was between 9.54 - 11.57% while ash was between 0.88 - 1.39%. Titratable acidity was between 0.85 - 1.62% while pH ranged between 3.58 and 4.21. Swelling capacity was slightly below 3 while yield ranged between 12 and 26%. The four principal components identified were dry matter, extent of fermentation, starch content and elemental composition of the gari. Age at harvestsignificantly affected (p < 0.05) moisture, pH and bulk density of the gari samples. Varietal effect was not significant

The physico-chemical properties of cassava starch in relation to the texture of the cooked root

No Abstract

The physico-chemical properties of cassava starch in relation to the texture of the cooked root

(Ghana Journal of Agricultural Science, 1995-96, 28-29: 69-80

Effects of cultivar and age at harvest on the dry matter, starch gelatinization properties and the cooking quality of cassava

No Abstract

Effects of cultivar and age at haverst on the dry matter, starch gelatinization properties and the cooking quality of cassava

(Ghana Journal of Agricultural Science, 1995-96, 28-29: 81-90

Evaluation of maturity and its correlated traits in an unadapted F2 maize population

This study was conducted to understand the mode of inheritance of maturity in an adapted by unadapted F2 maize population and to identify the best progeny of introgressed population to be used for single cross hybrid development. Thermal indices (growing degree days or heat units or thermal time), calculated from minimum and maximum temperatures, and a base temperature were used to measure the maturity of maize progenies. Two hundred and eleven (211) S1 families developed from a cross between an adapted Corn Belt maize inbred line (B73) and an unadapted maize population and their testcrosses were evaluated in two planting dates and two locations in 1995. Maturity was quantitatively inherited as trangressive segregation for all the traits observed, and few factors were responsible for the expression of maturity in maize. Earliness was dominant to lateness. Maturity measured in thermal units was better than calendar days. Based on the performance of the test crosses up to ten S1 lines could be selected for the development of single cross hybrids that could produce more grain than the check hybrids Journal of Science and Technology Vol.24(2) 2004: 13-2

Studies on the nutrient content of yellow pigmented cassava

Meeting: International Society for Tropical Root Crops. Africa Branch, Triennial Symposium, 2d, 14-19 Aug. 1983, Douala, CMIn IDL-737

Étude de la valeur nutritive du manioc à pigmentation jaune

Réunion: International Society for Tropical Root Crops. Africa Branch, Triennial Symposium, 2d, 14-19 Aug. 1983, Douala, CMDans IDL-638

Rice varietal screening: Relationship between certain Agronomic Parameters and Tolerance to Iron Toxicity

One of the limitations to the development of rice cuktivars which are tolerant to iron toxicity has been the lack of efficient screening techniques. Field and screenhouse experiments were carried out in Cote d'Ivoire between September 1994 and June 1996 to study the relationship between iron toxicity and some agronomic parameters, with the objective of improving the method of screening. Twenty eight varieties (treatments) were transplanted, 21 days after sowing, into adjacent iron toxic and non-toxic fields in Korhogo in northern Cote d'Ivoire. A randomized complete block design was used with three replications. Recommended rates of fertilizers were applied. Leaf symptoms of iron toxicity were scored using the IRRI scale (1 - 9). Data was also taken on the number of tillers at the maximum tilering stage, plant height at maturity and yield and its components. Iron toxicity symptoms ranged between 3-7. Significant relationships were observed between iron toxicity tolerances and reduction in plant height (r = 0.61) and reduction in yield (r = 0.63). No such relationship was however observed between iron toxicity tolerance and reduction in tillers. We conclude that reduction in grain yield and plant height are good criteria for assessing materials for tolerance to iron toxicity but reduction in tiller numbers is not. JOURNAL OF THE GHANA SCIENCE ASSOCIATION Volume 1 Number 1, July (1998) pp. 29-3