Biofortified staple crops, amongst them cassava, are being developed to reduce problems of micronutrient malnutrition. In 2006 new cassava varieties with increased levels of provitamin A were released. For the purpose of enhancing adoption of the new cassava varieties, two strategies were used: (...
González, C.
,
Pérez, S.
,
Cardozo, CE
,
Andrade, R.
,
Johnson, Nancy L.
,
[Analysis of diffusion strategies in northeast Brazil for new Cassava varieties with improved nutritional quality]
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Analysis of diffusion strategies in northeast Brazil for new Cassava varieties with improved nutritional quality
A survey for parasitoids of the whiteflies, Bemisia tuberculata Bondar, Trialeurodes variabilis Quantaince, T. vaporariorum (Westwood), Aleurotrachelus socialis Bondar, Tetraleurodes sp., Aleuroglandulus malangae Russell and Aleurodicus sp., was conducted in 6 cassava growing regions of Colombia ...
Trujillo García, H.E.
,
Arias, B.
,
Guerrero, JM
,
Hernández, P.
,
Bellotti, Anthony C.
,
Pena, JE
,
[Survey of parasitoids of whiteflies (Homoptera: Aleyrodidae) in cassava growing regions of Colombia and Ecuador]
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Survey of parasitoids of whiteflies (Homoptera: Aleyrodidae) in cassava growing regions of Colombia and Ecuador
Cassava Frogskin Disease (CFSD) can cause severe damage to cassava roots and is one of the most important diseases of cassava in Latin America. The principal objective of this study was to identify the causal agent of CFSD. Electron microscopy, viral purifications, double-stranded RNA (dsRNA) ana...
Calvert, Lee A.
,
Cuervo Ibáñez, Maritza
,
Lozano Potes, I
,
Villareal, N.
,
Arroyave, José A.
,
[Identification of three strains of a virus associated with cassava plants affected by Frogskin disease]
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Identification of three strains of a virus associated with cassava plants affected by Frogskin disease
The cassava core collection (601 genotypes) was evaluated for root and leaf contents of micronutrient minerals, ascorbic acid, and carotene. Wide genetic variability was observed for all measurements, indicating that there is good potential for exploiting and improving the nutritive value of cass...
Chavez, Alba L.
,
Bedoya Flores, JM
,
Sánchez, T.
,
Iglesias, C.A.
,
Ceballos, H.
,
Roca, William M.
,
[Iron, carotene, and ascorbic acid in cassava roots and leaves]
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Iron, carotene, and ascorbic acid in cassava roots and leaves
Cassava (Manihot esculenta) breeding at the earlier stages so far has been mainly based on a mass phenotypic recurrent selection, as little data is taken. This has resulted in a long breeding cycle and lack of organised information on the breeding values of parental lines used in the breeding pro...
Ojulong, H
,
Labuschagne, M.T.
,
Fregene, Martin A.
,
Herselman, L.
,
[A cassava clonal evaluation trial based on a new cassava breeding scheme]
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A cassava clonal evaluation trial based on a new cassava breeding scheme
Microsatellites or simple sequence repeats (SSR) are the markers of choice for molecular genetic mapping and marker-assisted selection in many crop species. A microsatellite-based linkage map of cassava was drawn using SSR markers and a F2 population consisting of 268 individuals. The F2 populati...
This review presents an overview of the importance, constraints, and prospects on different aspects of cassava (Manihot esculenta crantz) breeding for enhanced micronutrient level, including carotenoids (precursors for provitamin-A) and especially beta-carotene. Early cassava-breeding efforts con...
Njoku, DN
,
Vernon, G
,
Egesi, Chiedozie N.
,
Asante, I.K.
,
Offei, SK
,
Okogbenin, Emmanuel
,
Kulakow, P.A.
,
Eke-Okoro, O.N.
,
Ceballos, H.
,
[Breeding for enhanced ß-Carotene content in cassava: constraints and accomplishments]
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Breeding for enhanced ß-Carotene content in cassava: constraints and accomplishments
Cassava bacterial blight, caused by Xanthomonas axonopodis pv. manihotis (Xam), is a particularly destructive disease in South America and Africa. Because of quarantine procedures, international exchange of cassava germplasm is limited and occurs through true seeds or material propagated in vitro...
Cassava bacterial blight, caused by Xanthomonas axonopodis pv. manihotis (Xam) is a destructive disease occurring in most cassava growing-areas. Although Colombian isolates of Xam differ in DNA polymorphism and pathogenicity, no suitable host differentials have been identified to demonstrate phys...
Restrepo, S.
,
Duque E., Myriam Cristina
,
Verdier, Valérie
,
[Characterization of pathotypes among isolates of Xanthomonas axonopodis pv. manihotis in Colombia]
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Characterization of pathotypes among isolates of Xanthomonas axonopodis pv. manihotis in Colombia
We investigated whether cassava plants that are infested by the cassava mealybug, Phenacoccus herreni (Pseudococcidae, Sternorrhyncha), emit attractants for the encyrtid parasitoids Aenasius vexans Kerrich, Apoanagyrus (Epidinocarsis) diversicornis Howard, and Acerophagus coccois Smith. Bioassays...
Bertschy, C
,
Turlings, TCJ
,
Bellotti, Anthony C.
,
Dorn, S.
,
[Chemically-mediated attraction of three parasitoid species to mealybug-infested cassava leaves]
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Chemically-mediated attraction of three parasitoid species to mealybug-infested cassava leaves