Most cassava (Manihot esculenta Crantz) improvement programs depend on the range of variability available within the cultigen for breeding varieties adapted to target environments. Efforts by some programs to introduce additional variability from wild Manihot species into cassava have led to impr...
Asiedu, Robert
,
Hahn, S.K.
,
Bai, K.V.
,
Dixon, A.
,
[Interspecific hybridization in the genus Manihot progress and prospects]
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Interspecific hybridization in the genus Manihot progress and prospects
Stable as well as adaptable genotypes of high-yielding cassava cultivars, should be developed and made available to farmers, to ensure increases in cassava production in a target region or country in sub-Saharan Africa. As farmer-to-farmer contact is the primary means of diffusion of new crop var...
Dixon, A.
,
Asiedu, Robert
,
Hahn, S.K.
,
[Genotypic stability and adaptability: analytical methods and implications for cassava breeding for low input agriculture]
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Genotypic stability and adaptability: analytical methods and implications for cassava breeding for low input agriculture
In modern biological research, cassava has been an orphan crop, because most advances have taken place in developed countries where cassava is not grown. In order for cassava to profit from biotechnology, efforts around the world must be pooled, integrating developing countries into the process. ...
Thro, Ann Marie
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Roca, W.
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Asiedu, Robert
,
[The cassava biotechnology network and African agriculture research and development programmes]
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The cassava biotechnology network and African agriculture research and development programmes
Multilocational trials were conducted in several agroecological zones in West Africa to assess the magnitude of genotype x environment (G x E) interaction and to identify stable varieties which could be used in breeding programs in the region. The reaction of the varieties to major cassava diseas...
Otoo, J.
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Dixon, A.
,
Asiedu, Robert
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Okeke, J.E.
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Maroya, N.
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Tougnon, K.
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Okoli, O.
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Tetteh, J.P.
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Hahn, S.K.
,
[Genotype environment interaction studies with cassava]
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Genotype environment interaction studies with cassava
Interspecific crosses of five cultivated cassava varieties (2n=36) were made with two related Manihot species, M. epruinosa (2n=36) and M. glaziovii (2n=36). From these diploid interspecific crosses, four spontaneous tetraploids (2n=4x=72) and two triploids (2n=3x=54) were isolated for the first ...
Hahn, S.K.
,
Bai, K.V.
,
Asiedu, Robert
,
[Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava]
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Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava
Ng, N.Q.
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Asiedu, Robert
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Ng, S.Y.C.
,
[Cassava genetic resources programme at the International Institute of Tropical Agriculture]
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Cassava genetic resources programme at the International Institute of Tropical Agriculture
An agroecologically-based germplasm enhancement strategy to further broaden the genetic base of cassava in selected ecologies of Africa was initiated by CIAT and IITA in 1990. Crosses are being made at CIAT, in Colombia, using parents adapted to four different agroecologies of South America with ...
Porto, M.C.
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Asiedu, Robert
,
Dixon, A.
,
Hahn, S.K.
,
[An agroecologically oriented introduction of cassava germplasm from Latin America into Africa]
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An agroecologically oriented introduction of cassava germplasm from Latin America into Africa
Akano, A.O.
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Asiedu, Robert
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Ng, S.Y.C.
,
[Effect of African cassava mosaic disease on the yield of cassava derived from cuttings from tissue culture plants in two agroecological zones of Nigeria]
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Effect of African cassava mosaic disease on the yield of cassava derived from cuttings from tissue culture plants in two agroecological zones of Nigeria
The high demand for good quality planting materials of improved cassava (Manihot esculenta Crantz) cultivars by the farmers in sub-Saharan Africa are not fully met in a timely manner. Perishability, slow multiplication rate and bulkiness of planting materials, weak definition of multiplication re...
Ekanayake, I.
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Asiedu, Robert
,
Bieler, P.
,
[Production and delivery systems of good quality cassava planting materials in sub-Saharan Africa]
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Production and delivery systems of good quality cassava planting materials in sub-Saharan Africa