Assembled germplasm has provided breeders with valuable traits for the improvement of common beans. Molecular markers such as phaseolin and isozymes have facilitated understanding of the genus Phaseolus thus enabling breeders to develop more effective strategies. However, there are still gaps in ...
Tohme, Joseph M.
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[Existing bean variability and breeding activities at CIAT for new genetic combinations]
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Existing bean variability and breeding activities at CIAT for new genetic combinations
The etiology and epidemiology of web blight of beans (Thanatephorus cucumeris) are reviewed and its control through cultural practices, use of tolerant cv. and fungicides is discussed. Cultural practices that have proved effective in controlling the disease include use of pathogen-free seed, elim...
Brown, R.L.
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Bhatnagar, D.
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Cleveland, T.E.
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Chen, Z.
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Menkir, A.
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[Development of maize host resistance to aflatoxigenic fungi]
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Development of maize host resistance to aflatoxigenic fungi
The resistance of 9 bean cv. to isolates of Thanatephorus cucumeris collected from either leaves (Th-5) or roots (Rs-8) of infected plants was tested under controlled conditions in growth chambers (22-25 degrees Celsius, 80-100 percent RH and 12 h artificial light). Adequate concn. of inoculum of...
Castaño J., Mauricio
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[Evaluacion de germoplasma de frijol (Phaseolus vulgaris L.) para resistencia a mustia hilachosa]
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Evaluacion de germoplasma de frijol (Phaseolus vulgaris L.) para resistencia a mustia hilachosa
Cassava, Manihot esculenta, is one of the major food crops in sub-Saharan Africa (SSA) providing the bulk of dietary calories to hundreds of millions of households. Two viral diseases, namely cassava mosaic disease (CMD) and cassava brown streak disease (CBSD) pose a serious threat to cassava pro...
Gedil, M.
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Kumar, M.
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Igwe, D.
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[Isolation and characterization of resistant gene analogs in cassava, wild Manihot species, and castor bean (Ricinus communis)]
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Isolation and characterization of resistant gene analogs in cassava, wild Manihot species, and castor bean (Ricinus communis)
The importance of cassava, particularly in animal nutrition, is briefly discussed. The adaptability of cassava to infertile soils and low inputs, its production of more calories per land and labor unit than any other food crop, and its resistance to pests and diseases are highlighted. CIAT`s obje...
Rao, Idupulapati M.
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Miles, John W.
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García, Ramiro
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Ricaurte Oyola, José Jaumer
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[Selección de híbridos de Brachiaria con resistencia al aluminnio]
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Selección de híbridos de Brachiaria con resistencia al aluminnio
A descriptive and integrated look at the physiology of the bean plant is presented. Initially, the basic physiological processes that determine bean yields are discussed, namely (1) metabolic events such as photosynthesis, respiration, and N metabolism, which have a direct effect on growth, and (...
White, Jeffrey W.
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Izquierdo, J.
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[Frijol: fisiologia del potencial de rendimiento y tolerancia al estres]
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Frijol: fisiologia del potencial de rendimiento y tolerancia al estres
A standard system for the evaluation of bean germplasm under field conditions is described, including a table with the developmental stages of the common bean plant which is used in the proposed system. This system has been tested in Colombia and many countries in Latin America, Africa, and other...
Schoonhoven, Aart van
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Pastor Corrales, Marcial A.
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[Standard system for the evaluation of bean germplasm]
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Standard system for the evaluation of bean germplasm
Methods used to identify BCMV are described in terms of symptomatology (common mosaic, black root); transmission (seed, insect, manual); responses of differential bean cv. (mosaic, systemic or local necrosis, local lesions, immunity); cytology (light and electron microscopy); purification and ser...