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The effects of 0.2% aqueous solution of colchicine on the survival rate and morphological features of five accessions of Dioscorea alata were investigated. Sprouting buds of two month old plants were treated with 0.2% colchicine and their performances were monitored until maturity. Survival of bu...


Ajayi, A.T.Adesoye, A.I.Asiedu, RobertSartie, A.M.[Colchicine-induced variations in survival rate and morphological characteristics of water yam (Dioscorea alata)]Colchicine-induced variations in survival rate and morphological characteristics of water yam (Dioscorea alata)

A randomised complete block experiment was conducted in the 1998 and 1999 cropping seasons in five major yam growing areas in the yam belt of Nigeria to evaluate the performance and yield stability of six genotypes of water yarn (Dioscorea alata L). Location, genotype and their interaction effect...


Egesi, Chiedozie N.Ogunyemi, S.Asiedu, Robert[Genotype x environment interaction in water yam (Dioscorea alata) yield trials in five yamgrowing sites in Nigeria]Genotype x environment interaction in water yam (Dioscorea alata) yield trials in five yamgrowing sites in Nigeria

Amplified fragment length polymorphism (AFLP) markers were employed to assess intraspecific variability in water yam (Dioscorea alata L.). Fifty-three accessions of diverse geographic origins in West and Central Africa (Benin, Côte d'Ivoire, Ghana, Nigeria and Chad) and Puerto Rico were analysed ...


Egesi, Chiedozie N.Asiedu, RobertUde, G.Ogunyemi, S.Egunjobi, J.K.[AFLP marker diversity in water yam (Dioscorea alata L.)]AFLP marker diversity in water yam (Dioscorea alata L.)

Anthracnose and virus diseases exert devastating impacts on yam production in many tropical regions of the world where the crop contributes to food security and income generation. The complexities in their epidemiology necessitate the use of integrated approaches in their management. Six genotype...


Egesi, Chiedozie N.Onyeka, T.J.Asiedu, Robert[Severity of anthracnose and virus diseases of water yam (dioscorea alata L.) in NIgeria I: effects of yam genotype and date of planting]Severity of anthracnose and virus diseases of water yam (dioscorea alata L.) in NIgeria I: effects of yam genotype and date of planting

Water yam (Dioscorea alata) flour was processed using standard wet milling procedure prior to the extrusion process, which led to the determination of extrudate properties of the flours. A single-screw extruder (DCE 330, NJ) was used in evaluating the extrudate properties, which included torque, ...


Oke, M.O.Awonorin, S.O.Sanni, L.O.Asiedu, RobertAiyedun, P.O.[Effect of etrusion variables on Extrudates properties of water yam flours - a response surface analysis]Effect of etrusion variables on Extrudates properties of water yam flours - a response surface analysis

Production of improved water yam (Dioscorea alata) genotypes that are suitable for the preparation of amala (a popular darkish Nigerian food) would likely enhance the economic importance of the crop in Nigeria. Fermented flour (oven dried and sun dried) made from tubers of eight improved D. alata...


Ukpabi, U.J.Omodamiro, R.M.Ikeorgu, J.G.Asiedu, Robert[Sensory evaluation of amala from improved water yam (Dioscorea alata) genotypes in Nigeria]Sensory evaluation of amala from improved water yam (Dioscorea alata) genotypes in Nigeria

Yam anthracnose and virus diseases are the most important biotic constraints affecting yam production in the world. Six Dioscorea alata genotypes were evaluated for their reaction to these diseases in four distinct agro-ecological zones in Nigeria for two years. Data obtained were subjected to li...


Egesi, Chiedozie N.Onyeka, T.J.Asiedu, Robert[Environmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata)]Environmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata)

Saski, C.A.Bhattacharjee, R.Scheffler, B.E.Asiedu, Robert[Genomic resources for water yam (Dioscorea alata L.): analyses of EST sequences, De Novo sequencing and GBS libraries]Genomic resources for water yam (Dioscorea alata L.): analyses of EST sequences, De Novo sequencing and GBS libraries

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