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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...


Ekanayake, I.J.Asiedu, Robert[Problems and perspectives of yambased cropping systems in Africa]Problems and perspectives of yambased cropping systems in Africa

An extensively distributed root system may reduce the probability of crop failure during periods of restricted water supply . A quantitative measure of root distribution in the soil profile, i .e . pulling resistance of roots (PR), was tested at two moderately droughted tropical field sites . A t...


Ekanayake, I.J.Midmore, D.J.[Genotypic variation for root pulling resistance in potato and its relationship with yield under water deficit stress]Genotypic variation for root pulling resistance in potato and its relationship with yield under water deficit stress

Leaf resistances of 14 cultivated potato genotypes ( Solanum spp.) and three tuber-bearing wild Solanum species were compared when plants were grown under water stress at two tropical sites. Factors investigated were diurnal changes in leaf resistance, the effect of plant age, transient drought v...


Ekanayake, I.J.Jong, J.P. de[Stomatal response of some cultivated and wild tuberbearing potatoes in warm tropics as influenced by water deficit stress]Stomatal response of some cultivated and wild tuberbearing potatoes in warm tropics as influenced by water deficit stress

The gene pools for breeding cassava (Manihot esculenta Crantz) in Africa currently contain only a fraction of the existing genetic variation found in Latin America where the crop originates. Our research aimed to broaden the genetic base in Africa by introducing Latin American (LA) germplasm. The...


Okogbenin, EmmanuelPorto, M.C.M.Egesi, Chiedozie N.Mba, CEspinosa, E.Santos Melendez, LGOspina, C.Marin, JABarrera Sabogal, EGutiérrez A., Janeth PatriciaEkanayake, I.J.Iglesias, C.A.Fregene, Martin A.[Marker-assisted introgression of resistance to cassava mosaic disease into Latin American germplasm for the genetic improvement of cassava in Africa]Marker-assisted introgression of resistance to cassava mosaic disease into Latin American germplasm for the genetic improvement of cassava in Africa

Flower initiation in some plant species is associated with the physical and chemical soil characteristics such as the availability of certain mineral elements and soil moisture status. The objective of this study was to examine the effects of soil physicochemical traits on the differential flower...


Simwambana, M.S.C.Ekanayake, I.J.Ferguson, T.U.[Growth and flowering behavior of four cassava genotypes in two soil types and locations in southern Nigeria]Growth and flowering behavior of four cassava genotypes in two soil types and locations in southern Nigeria

The leaf is the site of photosynthetic activities and crop productivity is controlled by the sizes and efficiency of leaves. Leaf development in cassava can be dependent on genetic makeup of the plant and it is sensitive to temperature. The aim of this study was to quantify the relationships betw...


Akparobi, S.Togun, A.Ekanayake, I.J.[Temperature effects on leaf growth of cassava (Manihot esculenta Crantz) in controlled environments]Temperature effects on leaf growth of cassava (Manihot esculenta Crantz) in controlled environments
Ng, S.Y.C.Ekanayake, I.J.[Responses of cassava to polyethylene glycol mediated osmotic stress in vitro]Responses of cassava to polyethylene glycol mediated osmotic stress in vitro

Cultivated cassava (Manihot esculenta Crantz) genotypes are relatively sensitive to low temperature stress injury. The objective of this field study was to elucidate tuberous root development and growth differences among improved and local genotypes under lowland (higher seasonal temperature) and...


Akparobi, S.O.Ekanayake, I.J.Togun, A.[Genotypic variability for cassava tuberous root development in two lowaltitude and midaltitude savanna sites of Nigeria]Genotypic variability for cassava tuberous root development in two lowaltitude and midaltitude savanna sites of Nigeria

A description of cassava clones by their various mechanisms of tolerance to drought is useful in selecting parental clones tor hybridization and subsequent selection of clones from their progeny, which are targeted to various agroecological zones in the Sub-sahraran Africa. Evaluation of cassava ...


Ng, S.Y.C.Ekanayake, I.J.[Screening cassava (Manihot esculenta crantz) for polyethelene glycol mediated osmotic stress in vitro]Screening cassava (Manihot esculenta crantz) for polyethelene glycol mediated osmotic stress in vitro

Drought is responsible for large reductions in cassava root yields. On-farm root yields can be improved two- to three-fold and quality of fresh and processed products improved by the adoption of recently improved production technologies. The potential usefulness is high for genetic, morphological...


Ekanayake, I.J.[Conceptual issues in the use of cassava modelling for improved production in drought environments]Conceptual issues in the use of cassava modelling for improved production in drought environments

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