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Journal Article 1999

Autor: Barker, D.J. Keatinge, J.D.H. Asiedu, Robert

Tuber dormancy is of major importance in yam production, but the lack of a method to consistently break dormancy restricts the rate at which new clones can be multiplied to release to farmers. Much of the work on yam tuber dormancy was small scale, using only one or two clones and a few tubers. O...

Enlace original: https://cgspace.cgiar.org/handle/10568/96006

Investigación en Agricultura
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Barker, D.J. ,  Keatinge, J.D.H. ,  Asiedu, Robert ,  [Yam dormancy: potential mechanisms for its manipulation] ,  Yam dormancy: potential mechanisms for its manipulation
Journal Article 2001

Autor: Fokunang, C.N. Dixon, Alfred G.O. Ikotun, T. Tembe-Fokunang, E.A. Akem, C.N. Asiedu, Robert

Cassava anthracnose disease (CAD) caused by the fungus Colletotrichum gloeosporioides f.sp. manihotis has become one of the major economic diseases of cassava in Africa. The expansion of cassava production farmlands particularly in the humid rainfall zones of West and Central Africa has led to an...

Enlace original: https://cgspace.cgiar.org/handle/10568/97197

Investigación en Agricultura
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Fokunang, C.N. ,  Dixon, Alfred G.O. ,  Ikotun, T. ,  Tembe-Fokunang, E.A. ,  Akem, C.N. ,  Asiedu, Robert ,  [Anthracnose: an economic disease of cassava in Africa] ,  Anthracnose: an economic disease of cassava in Africa
Journal Article 2003

Autor: Ekanayake, I.J. Asiedu, Robert

Yams (Dioscorea spp.) constitute an important starchy staple in sub-Saharan Africa (SSA) where food security for a growing population is a critical issue. Mixed cropping in yam based systems is the norm in the region and productivity of yams in these systems is below potential. It is concluded th...

Enlace original: https://cgspace.cgiar.org/handle/10568/96363

Investigación en Agricultura
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Ekanayake, I.J. ,  Asiedu, Robert ,  [Problems and perspectives of yambased cropping systems in Africa] ,  Problems and perspectives of yambased cropping systems in Africa
Journal Article 2004

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

Symptoms of nutritional deficiencies in D. alata and D. rotundata were observed when yam plants were grown in nutrient solutions from which any of the following had been omitted: N, P, K, Ca, Mg, Zn, Fe, B, Mn, Cu and Mo. The symptoms of deficiency of major elements were visible on plants of both...

Enlace original: https://cgspace.cgiar.org/handle/10568/103377

Investigación en Agricultura
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Shiwachi, H. ,  Okonkwo, C. ,  Asiedu, Robert ,  [Nutrient deficiency symptoms in yams (Dioscorea spp.)] ,  Nutrient deficiency symptoms in yams (Dioscorea spp.)
Journal Article 2018-06-27

Autor: Norman, P.E. Asfaw, A. Tongoona, P.B. Danquah, A. Danquah, E.Y. Koeyer, D. de Asiedu, Robert

Controlled pollination in root and tuber crops is challenging. Complex ploidy, cross-incompatibility, erratic flowering patterns, outcrossing, etc., limit the efficiency of breeding progress in these crops. Half-sib breeding that involves random pollination among parents is a viable method to har...

Enlace original: https://cgspace.cgiar.org/handle/10568/96137

Investigación en Agricultura
DNA
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Norman, P.E. ,  Asfaw, A. ,  Tongoona, P.B. ,  Danquah, A. ,  Danquah, E.Y. ,  Koeyer, D. de ,  Asiedu, Robert ,  [Can parentage analysis facilitate breeding activities in root and tuber crops?] ,  Can parentage analysis facilitate breeding activities in root and tuber crops?
Journal Article 2019-07

Autor: Alabi, T.R. Adebola, P.O. Asfaw, A. Koeyer, D. de López Montes, A. Asiedu, Robert

Yam (Dioscorea spp.) is a major staple crop with high agricultural and cultural significance for over 300 million people in West Africa. Despite its importance, productivity is miserably low. A better understanding of the environmental context in the region is essential to unlock the crop’s poten...

Enlace original: https://cgspace.cgiar.org/handle/10568/98316

Investigación en Agricultura
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Alabi, T.R. ,  Adebola, P.O. ,  Asfaw, A. ,  Koeyer, D. de ,  López Montes, A. ,  Asiedu, Robert ,  [Spatial multivariate cluster analysis for defining target population of environments in west Africa for yam breeding] ,  Spatial multivariate cluster analysis for defining target population of environments in west Africa for yam breeding
Journal Article 2008

Autor: Akin-Idowu, P.E. Odunola, O.A. Asiedu, Robert Maziya-Dixon, B.B. Uwaifo, A.O.

Eight genotypes of yellow yam (Dioscorea cayenensis) were planted at locations in two major yam-growing agroecologies of Nigeria (Onne in the humid forest zone and Ibadan in the forest/savannah transition zone) for assessment of the contents of minerals and antinutrients. Significant differences ...

Enlace original: https://cgspace.cgiar.org/handle/10568/90929

Investigación en Agricultura
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Akin-Idowu, P.E. ,  Odunola, O.A. ,  Asiedu, Robert ,  Maziya-Dixon, B.B. ,  Uwaifo, A.O. ,  [Variation in nutrient and antinutrient contents of tubers from yellow yam (Dioscorea cayenensis) genotypes grown at two locations] ,  Variation in nutrient and antinutrient contents of tubers from yellow yam (Dioscorea cayenensis) genotypes grown at two locations
Journal Article 2009

Autor: Abang, Mathew M. Abraham, W.R. Asiedu, Robert Hoffmann, P. Wolf, G. Winter, S.

Highly virulent, slow-growing grey (SGG); moderately virulent, fast-growing salmon (FGS); and avirulent/weakly virulent, fast-growing grey (FGG) forms of Colletotrichum gloeosporioides have been described from yam (Dioscorea spp.), but little is known about their chemodiversity or the role of tox...

Enlace original: https://cgspace.cgiar.org/handle/10568/90179

Investigación en Agricultura
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Abang, Mathew M. ,  Abraham, W.R. ,  Asiedu, Robert ,  Hoffmann, P. ,  Wolf, G. ,  Winter, S. ,  [Secondary metabolite profile and phytotoxic activity of genetically distinct forms of Colletotrichum gloeosporioides from yam (Dioscorea spp.)] ,  Secondary metabolite profile and phytotoxic activity of genetically distinct forms of Colletotrichum gloeosporioides from yam (Dioscorea spp.)
Journal Article 2009

Autor: Obidiegwu, J.E. Loureiro, J. Ene-Obong, E.E. Rodríguez, E. Kolesnikova-Allen, M. Santos, C. Muoneke, C. Asiedu, Robert

The Guinea yams, Dioscorea cayenensis Lam. and D. rotundata Poir. (D. cayenensis–D. rotundata complex), represent a highly importantcrop, widely distributed in the humid and semi-humidtropics. The ploidy levels of 170 accessions of the core set of Guinea yams from West African coun...

Enlace original: https://cgspace.cgiar.org/handle/10568/90195

Investigación en Agricultura
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Obidiegwu, J.E. ,  Loureiro, J. ,  Ene-Obong, E.E. ,  Rodríguez, E. ,  Kolesnikova-Allen, M. ,  Santos, C. ,  Muoneke, C. ,  Asiedu, Robert ,  [Ploidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set] ,  Ploidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set
Journal Article 2009

Autor: Otoo, E. Asiedu, Robert

A five-year study involving 38 genotypes of D. rotundata cultivar Tela was evaluated in 15 environments from 2000 to 2004 using CRD. The three locations were Bodwease (Coastal Savanna), Fumesua (Forest) and Wenchi (Forest-Savanna Transition). The objective was to assess the effect of genotype and...

Enlace original: https://cgspace.cgiar.org/handle/10568/90213

Investigación en Agricultura
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Otoo, E. ,  Asiedu, Robert ,  [GGE biplot analysis of Dioscorea rotundata cultivar tela genotypes in Ghana] ,  GGE biplot analysis of Dioscorea rotundata cultivar tela genotypes in Ghana

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