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Parkes, E.Kulakow, P.A.Alamu, E.O.Maziya-Dixon, B.B.Aina, O.O.Ofei, R.Iluebbey, P.Agbona, A.Bakare, M.Dixon, A.[Performance of proVitamin A cassava clones across eleven environments in two seasons in Nigeria]Performance of proVitamin A cassava clones across eleven environments in two seasons in Nigeria

Current approaches to equipment development are discussed in this paper that highlights levels of adoption by African processors. The cassava industry in Nigeria is progressing from cottage level through to small and medium scales and gradually moving towards large-scale operations. More highly c...


Sanni, L.O.Alenkhe, B.Edosio, R.Patino, M.Dixon, A.[Technology transfer in developing countries: capitalizing on equipment development]Technology transfer in developing countries: capitalizing on equipment development

Research aimed at selecting varieties of cassava (Manihot esculenta Crantz) with potential for high storage root yields through identification of stable yield components that can be used as selection criteria was carried out at three locations of different altitudes in Uganda. Multiple regression...

Une recherche visant à sélectionner des variétés potentielles à haut rendement en tubercules du manioc (Manihot esculenta Crantz) par identification des composantes stables de rendement qui peuvent étre utilisées comme critères de selection a été conduite dans trois localités de differentes altit...


Ntawuruhunga, PheneasRubaihayo, P.Whyte, J.Dixon, A.Osiru, D.[Inter-relationships among traits and path analysis for yield components of cassava: a search for storage root yield indicators]Inter-relationships among traits and path analysis for yield components of cassava: a search for storage root yield indicators

James, B.Yaninek, John S.Tumanteh, A.Maroya, N.Dixon, A.Salawu, R.Kwarteng, J.[Starting a cassava farm]Starting a cassava farm

Genotype by environment interaction (G x E) is a major problem in the study of quantitative traits as it complicates the interpretation of genotypes evaluation experiments and makes predications of performance difficult. In order to disentangle the genetic and GxE effects and get meaningful inter...

L'interaction entre génotype et environnement est un problème majeur dans l' étude des caractères quantitatifs puisqu'il complique l'interprétation de l'évaluation des génotypes et rend difficile la prediction de la performance du rendement. En vue de séparer la génétique des effects de l'interac...


Ntawuruhunga, PheneasRubaihayo, P.Whyte, J.Dixon, A.Osiru, D.[Additive main effects and multiplicative interaction analysis for storage root yield of cassava genotypes evaluated in Uganda]Additive main effects and multiplicative interaction analysis for storage root yield of cassava genotypes evaluated in Uganda

The contributions of soil variables to the variations in the yields of cassava (Manihot esculenta), yam (Dioscorea rotundata), maize (Zea mays) and pigeon pea (Cajanus cajan) were evaluated over 2 years in this study. The data were from three replicates of two randomized complete block design exp...


Asadu, C.Dixon, A.Okechukwu, R.[Comparative evaluation of the contributions of soil physicochemical properties to variations in the yields of four major staple food crops in eastern Nigeria]Comparative evaluation of the contributions of soil physicochemical properties to variations in the yields of four major staple food crops in eastern Nigeria

Genotype x environment (G x E) interactions frequently complicate breeding efforts and delay progress in selection. The cassava green spider mite (CGM) (Mononychellus tanajoa Bondar) is a serious constraint to Cassava production in Africa. Nine cassava genotypes were grown at 6 representative loc...

and influenced the relative ranking of genotypes across environments. The magnitude 01 the G x E interaction effect for CGM was higher than that for genotypes. Clone 63397 had the smallest interaction for CGM, showing stability in response to the pest across agroecologies. TME 1 suffered the leas...


Nukenine, E.Dixon, A.Ngeve, J.[Genotype x environment effects on cassava response to the green mite (Mononychellus tanajoa)]Genotype x environment effects on cassava response to the green mite (Mononychellus tanajoa)

The within-plant distribution of the cassava green spider mite, Mononychellus tanajoa Bondar, and the anatomical characteristics and the chemical components relating to varietal resistance of cassava, were studied using 11 cassava genotypes with varying levels of resistance for two dry seasons an...


Nukenine, E.Hassan, A.Dixon, A.[Influence of variety on the withinplant distribution of cassava green spider mite (Acari: Tetranychidae), and leaf anatomical characteristics and chemical components in relation to varietal resistance]Influence of variety on the withinplant distribution of cassava green spider mite (Acari: Tetranychidae), and leaf anatomical characteristics and chemical components in relation to varietal resistance

Thirty-five cassava (Manihot esculenta Crantz) genotypes from the International Institute of Tropical Agriculture (IITA), germplasm collection were planted in May 1992 under natural disease infection conditions, at the IITA field plots at Ibadan, Nigeria. The genotypes were evaluated at monthly i...


Fokunang, C.N.Akem, C.Dixon, A.Ikotun, T.[Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield]Evaluation of a cassava germplasm collection for reaction to three major diseases and the effect on yield

Nine cassava genotypes were grown for three years at six sites representing three agro-ecological zones in Nigeria to study their reaction to cassava bacterial blight (CBB), investigate genotype × environment (G×E) interaction patterns for their reaction to CBB, and to identify genotypes with sta...


Dixon, A.Ngeve, J.Nukenine, E.[Genotype x environment effects on severity of cassava bacterial blight disease caused by Xanthomonas axonopodis pv. manihotis]Genotype x environment effects on severity of cassava bacterial blight disease caused by Xanthomonas axonopodis pv. manihotis

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