The intense debate over agricultural biotechnology is at once fascinating, confusing and disappointing. It is complicated by issues of ethical, moral, socio-economic, political, philosophical and scientific import. Its vocal champions exaggerate their claims of biotechnology as saviour of the poo...
Kelemu, Segenet
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Mahuku, George S.
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Fregene, Martin A.
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Pachico, Douglas H.
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Johnson, Nancy L.
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Calvert, Lee A.
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Rao, Idupulapati M.
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Buruchara, Robin A.
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Amede, Tilahun
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Kimani, P.M.
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Kirkby, Roger A.
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Kaaria, Susan K.
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Ampofo, James Kwasi O.
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[Harmonizing the agricultural biotechnology debate for the benefit of African farmers]
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Harmonizing the agricultural biotechnology debate for the benefit of African farmers
Breeding goals of yield increases, root quality improvement, and disease resistance in cassava are considerably slowed down by biological characteristics of the crop, which includes a long growth cycle, a heterozygous genetic background and a poor knowledge of the organization of crop diversity. ...
Fregene, Martin A.
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Okogbenin, Emmanuel
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Mba, C
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Angel, F.
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Suarez, MC
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Gutiérrez A., Janeth Patricia
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Chavarriaga Aguirre, Paul
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Roca, William M.
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Bonierbale, Merideth W.
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Tohme, Joseph M.
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[Genome mapping in cassava improvement: Challenges, achievements and opportunities]
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Genome mapping in cassava improvement: Challenges, achievements and opportunities
Carabalí, A.
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Bellotti, Anthony C.
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Montoya Lerma, J
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Fregene, Martin A.
,
[Manihot flabellifolia Pohl, wild source of resistance to the whitefly Aleurotrachelus socialis Bondar (Hemiptera: Aleyrodidae)]
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Manihot flabellifolia Pohl, wild source of resistance to the whitefly Aleurotrachelus socialis Bondar (Hemiptera: Aleyrodidae)
Several molecular marker systems have been developed for assessing genetic diversity in crop germplasm collections. A trade-off often exists between the number of loci that can feasibly be sampled by a marker system and the amount of information provided by each locus. We compared the usefulness ...
Hurtado Lopez, PX
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Olsen, KM
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Buitrago, C.
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Ospina, C.
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Marin, JA
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Duque E., Myriam Cristina
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Vicente, M.C. de
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Wongtiem, Prapit
,
Wenzl, Peter
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Killian, A
,
Adekele, M.
,
Fregene, Martin A.
,
[Comparison of simple sequence repeat (SSR) and diversity array technology (DArT) markers for assessing genetic diversity in cassava Manihot esculenta Crantz)]
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Comparison of simple sequence repeat (SSR) and diversity array technology (DArT) markers for assessing genetic diversity in cassava Manihot esculenta Crantz)
The genetic basis of early bulking in cassava was studied in a replicated, multi-locational trial using 144 F1 progeny derived from an intra-specific cross between two non-inbred parents. A second, sequential harvest experiment examined the relative importance of eight yield-related traits on ear...
Okogbenin, Emmanuel
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Fregene, Martin A.
,
[Genetic analysis and QTL mapping of early root bulking in an F1 population of non-inbred parents in cassava (Manihot esculenta Crantz)]
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Genetic analysis and QTL mapping of early root bulking in an F1 population of non-inbred parents in cassava (Manihot esculenta Crantz)
La yuca se cultiva por sus raíces y es el tercer cultivo fuente de calorías en el trópico. Los limitantes de la productividad incluyen constricciones bióticas y abióticas. Adicionalmente, los productores tienen problemas en el mercadeo por su rápido deterioro poscosecha y el bajo nivel de almidón...
Tofiño Rivera, Adriana Patricia
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Romero, HM
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Fregene, Martin A.
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Rosero, EA
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[Posibilidades y alcances del mejoramiento genético basado en mutación inducida en yuca (Manihot esculenta Crantz)]
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Posibilidades y alcances del mejoramiento genético basado en mutación inducida en yuca (Manihot esculenta Crantz)
El almidón de yuca presenta escasa variación en su calidad. Las mutaciones inducidas son una fuente de variación heredable para características deseables. Estas mutaciones, aunque se presentaran genéticamente, serian difíciles de detectar fenotípicamente debido a su alta heterocigosidad. El objet...
Rosero, EA
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Ceballos, H.
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Fregene, Martin A.
,
Tofiño Rivera, Adriana Patricia
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Morante, N
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Pérez Velásquez, Juan Carlos
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Castelblanco, WH
,
[Avances en la obtención de variedades de yuca (Manihot esculenta Crantz) con alta calidad de almidón mediante mutación inducida]
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Avances en la obtención de variedades de yuca (Manihot esculenta Crantz) con alta calidad de almidón mediante mutación inducida
The cassava breeding scheme currently used is long, because initial stages concentrate mainly on improving yield, with root quality selection following later. To shorten the scheme, yield and root quality should be selected simultaneously, starting at the seedling nursery. In this study, a nurser...
Ojulong, HF
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Labuschagne, M.T.
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Herselman, L.
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Fregene, Martin A.
,
[Yield traits as selection indices in seedling populations of cassava]
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Yield traits as selection indices in seedling populations of cassava
Cassava brown streak disease (CBSD) is an economically important virus disease causing significant losses to cassava root yield and quality in east, central and southern Africa. Breeding for resistance in cassava requires an understanding of the underlying genetic control of CBSD resistance. Sour...
Kulembeka, H.P.
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Ferguson, M.
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Herselman, L.
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Kanju, E.
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Mkamilo, G.S.
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Masumba, E.
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Fregene, Martin A.
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Labuschagne, M.T.
,
[Diallel analysis of field resistance to brown streak disease in cassava (Manihot esculenta Crantz) landraces from Tanzania]
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Diallel analysis of field resistance to brown streak disease in cassava (Manihot esculenta Crantz) landraces from Tanzania
Cassava mosaic disease (CMD) is a viral disease of the important tropical staple crop cassava (Manihot esculenta) and preferred management involves use of host–plant resistance. The best available resistance is controlled by a single dominant gene. Serial analysis of gene expression (SAGE) was us...
Fregene, Martin A.
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Matsumura, H.
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Akano, A.
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Dixon, A.
,
Terauchi, R.
,
[Serial analysis of gene expression (SAGE) of hostplant resistance to the cassava mosaic disease (CMD)]
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Serial analysis of gene expression (SAGE) of hostplant resistance to the cassava mosaic disease (CMD)