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Journal Article 2005

Autor: Mignouna, H. Abang, Mathew M. Wanyera, N. Chikaleke, V. Asiedu, Robert Thottappilly, G.

Reliable characterization of the variation among wild and cultivated yams in Nigeria is essential for improved management and efficient utilization of yam genetic resources. RAPD and double stringency PCR (DS-PCR) analyses were used to investigate genetic relationships and the extent of redundanc...

Enlace original: https://cgspace.cgiar.org/handle/10568/91792

Investigación en Agricultura
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Mignouna, H. ,  Abang, Mathew M. ,  Wanyera, N. ,  Chikaleke, V. ,  Asiedu, Robert ,  Thottappilly, G. ,  [PCR markerbased analysis of wild and cultivated yams (Dioscorea spp.)in Nigeria: genetic relationships and implication for ex situ conservation] ,  PCR markerbased analysis of wild and cultivated yams (Dioscorea spp.)in Nigeria: genetic relationships and implication for ex situ conservation
Journal Article 2005

Autor: Egesi, Chiedozie N. Ogunyemi, S. Asiedu, Robert

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/91791

Investigación en Agricultura
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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
Journal Article 2006

Autor: Abang, Mathew M. Asiedu, Robert Hoffmann, P. Wolf, G.A. Mignouna, H.D. Winter, S.

Anthracnose, caused by Colletotrichum gloeosporioides Penz., is the most severe foliar disease of water yam (Dioscorea alata) worldwide. Population genetic analyses can yield useful insights into the evolutionary potential of C. gloeosporioides and thus lead to the development of appropriate dise...

Enlace original: https://cgspace.cgiar.org/handle/10568/91410

Investigación en Agricultura
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Abang, Mathew M. ,  Asiedu, Robert ,  Hoffmann, P. ,  Wolf, G.A. ,  Mignouna, H.D. ,  Winter, S. ,  [Pathogenic and genetic variability among Colletotrichum gloeosporioides isolates from different yam hosts in the agroecological zones in Nigeria] ,  Pathogenic and genetic variability among Colletotrichum gloeosporioides isolates from different yam hosts in the agroecological zones in Nigeria
Journal Article 2006

Autor: Shiwachi, H. Kikuno, H. Okonkwo, C.C. Asiedu, Robert

Growth of varieties of Dioscorea alata and D. rotundata were stunted when they were grown in nutrient solutions containing 5 to 60 mg l−1 Fe. In D. alata variety TDa 95/00361, plants grown in 60 mg l−1 Fe solution exhibited reductions of 29–65% in plant height, leaf length and width, number of le...

Enlace original: https://cgspace.cgiar.org/handle/10568/91411

Investigación en Agricultura
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Shiwachi, H. ,  Kikuno, H. ,  Okonkwo, C.C. ,  Asiedu, Robert ,  [Iron toxicity symptoms in yams (Dioscorea spp.) grown in water culture] ,  Iron toxicity symptoms in yams (Dioscorea spp.) grown in water culture
Journal Article 2006

Autor: Otegbayo, B. Aina, J. Asiedu, Robert Bokanga, M.

Low efficiency of available screening procedures constrains breeding and selection of yams (Dioscorea spp.) towards high textural quality of food products made from their tubers. This study was undertaken to determine the potential usefulness of pasting characteristics of fresh yams as rapid indi...

Enlace original: https://cgspace.cgiar.org/handle/10568/91351

Investigación en Agricultura
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Otegbayo, B. ,  Aina, J. ,  Asiedu, Robert ,  Bokanga, M. ,  [Pasting characteristics of fresh yams (Dioscorea spp.) as indicators of textural quality in a major food product: pounded yam] ,  Pasting characteristics of fresh yams (Dioscorea spp.) as indicators of textural quality in a major food product: pounded yam
Journal Article 2006

Autor: Odu, B.O. Asiedu, Robert Shoyinka, S.A. Hughes, J.D.

Nineteen white yam (Dioscorea rotundata Poir.) genotypes were grown in four agroecological zones in Nigeria for 2 years to study their responses to yam virus diseases, and to investigate the influence of genotype × environment (G × E) interactions on their reactions to virus infection, using the ...

Enlace original: https://cgspace.cgiar.org/handle/10568/91350

Investigación en Agricultura
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Odu, B.O. ,  Asiedu, Robert ,  Shoyinka, S.A. ,  Hughes, J.D. ,  [Reaction of white guinea yam (Dioscorea rotundata Poir.) genotypes to virus diseases in four agroecological zones in Nigeria] ,  Reaction of white guinea yam (Dioscorea rotundata Poir.) genotypes to virus diseases in four agroecological zones in Nigeria
Journal Article 2006

Autor: Odu, B.O. Asiedu, Robert Shoyinka, S.A. Hughes, J.A.

Studies were made to identify sources of resistance to yam viruses in Dioscorea alata. Forty genotypes of D. alata were evaluated in both the field and in the screenhouse for reactions to the yam viruses: Yam mosaic virus (YMV), genus Potyvirus; Dioscorea alata virus (DAV), genus Potyvirus; Cucum...

Enlace original: https://cgspace.cgiar.org/handle/10568/91349

Investigación en Agricultura
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Odu, B.O. ,  Asiedu, Robert ,  Shoyinka, S.A. ,  Hughes, J.A. ,  [Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria] ,  Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria
Journal Article 1997

Autor: Akano, A.O. Atiri, G. Ng, S.Y.C. Asiedu, Robert
Enlace original: https://cgspace.cgiar.org/handle/10568/103831

Investigación en Agricultura
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Akano, A.O. ,  Atiri, G. ,  Ng, S.Y.C. ,  Asiedu, Robert ,  [Effect of African cassava mosaic disease on growth and yield components of virustested cassava genotypes derived from meristem culture in early and late planting periods in three agroecologies of Nigeria] ,  Effect of African cassava mosaic disease on growth and yield components of virustested cassava genotypes derived from meristem culture in early and late planting periods in three agroecologies of Nigeria
Journal Article 2006

Autor: Otoo, E. Asiedu, Robert

Cultivar evaluation and mega-environment identification are the most important objectives of multi-environment trials (MET). The objective of this study was to assess the effect of genotype and genotype x environment interaction on the tuber yield of 18 yellow yam (D. cayenensis L.) genotypes via...

Enlace original: https://cgspace.cgiar.org/handle/10568/91352

Investigación en Agricultura
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Otoo, E. ,  Asiedu, Robert ,  [Cultivar evaluation and megaenvironment investigation of Dioscorea cayenensis cultivars in Ghana based on the GGE Biplot analysis] ,  Cultivar evaluation and megaenvironment investigation of Dioscorea cayenensis cultivars in Ghana based on the GGE Biplot analysis
Journal Article 2007

Autor: Amegbeto, N.K. Manyong, Victor M. Coulibaly, O. Asiedu, Robert

This study examined the dynamics of fresh yam tuber prices and applied a hedonic pricing model to estimate the market values of tuber characteristics in two consumption centers in Togo. Real prices were modeled as a function of variables measuring yam species, physical attributes of tuber, origin...

Enlace original: https://cgspace.cgiar.org/handle/10568/91339

Investigación en Agricultura
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Amegbeto, N.K. ,  Manyong, Victor M. ,  Coulibaly, O. ,  Asiedu, Robert ,  [Determinants of market value for fresh yam (Dioscorea species) tubers in two consumption centers in Togo] ,  Determinants of market value for fresh yam (Dioscorea species) tubers in two consumption centers in Togo

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