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Journal Article 2003-12

Autor: Abang, Mathew M. Winter, S. Mignouna, H.D. Green, K.R. Asiedu, Robert

Water yam (Dioscorea alata L.) is the most widely cultivated yam species globally. The major limitation to the profitable and sustainable production of D. alata is its susceptibility to anthracnose disease. The availability of resistant varieties could potentially form the cornerstone of an integ...

Enlace original: https://cgspace.cgiar.org/handle/10568/96374

Investigación en Agricultura
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Abang, Mathew M. ,  Winter, S. ,  Mignouna, H.D. ,  Green, K.R. ,  Asiedu, Robert ,  [Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease] ,  Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease
Journal Article 2014

Autor: Balogun, M. Maroya, N. Asiedu, Robert

Yam production is constrained by scarcity of clean seed, pests, diseases and low soil fertility in the informal seed system, which is still operational, causing up to 90% yield losses. Although meristem culture can be effective for producing healthy seed yam, its use is limited by slow rate of re...

Enlace original: https://cgspace.cgiar.org/handle/10568/75918

Investigación en Agricultura
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Balogun, M. ,  Maroya, N. ,  Asiedu, Robert ,  [Status and prospects for improving yam seed systems using temporary immersion bioreactors] ,  Status and prospects for improving yam seed systems using temporary immersion bioreactors
Journal Article 2009

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

The genetic diversity of 219 accessions of Guinea yam germplasm from Benin, Congo, Côte d’ Ivoire,Equatorial Guinea, Gabon, Ghana, Nigeria, Sierra Leone and Togo was accessed using 15 microsatelliteloci. High diversity of 0.677 was found among the accessions. An allelic average of 8.06 andpolymor...

Enlace original: https://cgspace.cgiar.org/handle/10568/91519

Investigación en Agricultura
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Obidiegwu, J.E. ,  Kolesnikova-Allen, M. ,  Ene-Obong, E.E. ,  Muoneke, C.O. ,  Asiedu, Robert ,  [SSR markers reveal diversity in Guinea yam (Dioscorea cayenensis/D. rotundata) core set] ,  SSR markers reveal diversity in Guinea yam (Dioscorea cayenensis/D. rotundata) core set
Journal Article 2009

Autor: Mignouna, H.D. Abang, Mathew M. Asiedu, Robert Geeta, R.

This protocol describes how to produce yam (Dioscorea) seeds through controlled pollination of flowers on female plants. Pollination by flower thrips takes place naturally in normal yam-growing environments in the presence of flowering male and female genotypes, although it is not efficient. This...

Enlace original: https://cgspace.cgiar.org/handle/10568/90221

Investigación en Agricultura
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Mignouna, H.D. ,  Abang, Mathew M. ,  Asiedu, Robert ,  Geeta, R. ,  [Producing yam (Dioscorea) seeds through controlled crosses] ,  Producing yam (Dioscorea) seeds through controlled crosses
Journal Article 2009

Autor: Mignouna, H.D. Abang, Mathew M. Asiedu, Robert Geeta, R.
Enlace original: https://cgspace.cgiar.org/handle/10568/90223

Investigación en Agricultura
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Mignouna, H.D. ,  Abang, Mathew M. ,  Asiedu, Robert ,  Geeta, R. ,  [Culturing meristematic tissue and node cuttings from yams (Dioscorea)] ,  Culturing meristematic tissue and node cuttings from yams (Dioscorea)
Journal Article 2009

Autor: Mignouna, H.D. Abang, Mathew M. Asiedu, Robert Geeta, R.
Enlace original: https://cgspace.cgiar.org/handle/10568/90217

Investigación en Agricultura
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Mignouna, H.D. ,  Abang, Mathew M. ,  Asiedu, Robert ,  Geeta, R. ,  [True yams (Dioscorea): a biological and evolutionary link between eudicots and grasses] ,  True yams (Dioscorea): a biological and evolutionary link between eudicots and grasses
Journal Article 2002

Autor: Egesi, Chiedozie N. Asiedu, Robert

The AMMI model combines regular analysis of variance for additive main effects with principal component analysis for multiplicative structure within the interaction. It also improves the accuracy of crop yield estimates and selects genotypes with highest yields. Despite knowledge of the model, po...

Le modèle AMMI combine l’analyse régulière de la variance pour les principaux effets additifs avec une analyse des composantes principales avec une structure d’intéraction multiplicative. Il améliore aussi l’estimation des rendements et la sélection des génotypes à haut rendement. En dépit de la ...

Enlace original: https://cgspace.cgiar.org/handle/10568/92753

Investigación en Agricultura
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Egesi, Chiedozie N. ,  Asiedu, Robert ,  [Analysis of yam yields using the additive main effects and multiplicative interaction (AMMI) model] ,  Analysis of yam yields using the additive main effects and multiplicative interaction (AMMI) model
Journal Article 2009

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

Nuclear DNA content of 54 accessions of 6 Dioscorea species collected from West African countries were determined using flow cytometry. Observed ploidy levels are diploid (2x), triploid (3x), tetraploid (4x), hexaploid (6x) and octoploid (8x). DNA index varied from 0.36 to 1.54 depending on the c...

Enlace original: https://cgspace.cgiar.org/handle/10568/90219

Investigación en Agricultura
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Obidiegwu, J.E. ,  Rodríguez, E. ,  Ene-Obong, E.E. ,  Loureiro, J. ,  Muoneke, C.O. ,  Santos, C. ,  Kolesnikova-Allen, M. ,  Asiedu, Robert ,  [Estimation of the nuclear DNA content in some representative of genus Dioscorea] ,  Estimation of the nuclear DNA content in some representative of genus Dioscorea
Journal Article 2008-04

Autor: Ukpabi, U.J. Omodamiro, R.M. Ikeorgu, J.G. Asiedu, Robert

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/90905

Investigación en Agricultura
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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
Journal Article 2010

Autor: Babil, P.K. Kikuno, H. Shiwachi, H. Toyohara, H. Fujigaki, J. Fujimaki, H. Asiedu, Robert

The genus Dioscorea is considered to be one of the most difficult groups for cyto-taxonomic studies because of the large number and small size of the chromosomes. The objective of the present study was to develop an efficient method of chromosome observation by identifying the optimum time for co...

Enlace original: https://cgspace.cgiar.org/handle/10568/90365

Investigación en Agricultura
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Babil, P.K. ,  Kikuno, H. ,  Shiwachi, H. ,  Toyohara, H. ,  Fujigaki, J. ,  Fujimaki, H. ,  Asiedu, Robert ,  [Optimum time for collection of root samples for chromosome observation in yams (Dioscorea spp.)] ,  Optimum time for collection of root samples for chromosome observation in yams (Dioscorea spp.)

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