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Cassava mosaic disease (CMD) is the most-important disease of cassava (Manihot esculenta) in Africa, and is a potential threat to Latin American (LA) cassava production. Although this viral disease is still unknown in LA, its vector – the whitefly – has recently been found. The disease is best co...


Akano, A.O.Dixon, Alfred G.O.Mba, CBarrera Sabogal, EFregene, Martin A.[Genetic mapping of a dominant gene conferring resistance to cassava mosaic disease]Genetic mapping of a dominant gene conferring resistance to cassava mosaic disease

The angiosperm circadian clock has been well established from molecular-genetic studies in a temperate plant model. Conservation of clock function is less explored in plants from the tropics. Cassava (Manihot esculenta) is a staple crop grown in the tropics that has been of limited research inter...


Adeyemo, O. SarahKolmos, ETohme, Joseph M.Chavarriaga Aguirre, PaulFregene, Martin A.Davis, S.J.[Identification and characterization of the Cassava core-clock gene Early Flowering 4]Identification and characterization of the Cassava core-clock gene Early Flowering 4

Cassava (Manihot esculenta) is a major food staple for nearly 600 million people in Africa, Asia, and Latin America. Major losses in yield result from biotic and abiotic stresses that include diseases such as Cassava Mosaic Disease (CMD) and Cassava Bacterial Blight (CBB), drought, and acid soils...


Anderson, J.W.Delseny, MFregene, Martin A.Jorge, VMba, CLópez, C.E.Restrepo, S.Soto Suárez, M.Piegu, BVerdier, ValérieCooke, RGTohme, Joseph M.Horvat, DP[An EST resource for cassava and other species of Euphorbiaceae]An EST resource for cassava and other species of Euphorbiaceae

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, HLabuschagne, M.T.Fregene, Martin A.Herselman, L.[A cassava clonal evaluation trial based on a new cassava breeding scheme]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...


Okogbenin, EmmanuelMarin, JAFregene, Martin A.[An SSR-based molecular genetic map of cassava]An SSR-based molecular genetic map of cassava

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

Fourteen microsatellites containing GA-repeats were isolated and characterized in cassava (Manihot esculenta Crantz, Euphorbiaceae). Microsatellite heterozygosity (h) was estimated in 48 accessions using (32P)-end-labeled primers and in more than 500 accessions using fluorescence-based genotyping...


Chavarriaga Aguirre, PaulMaya, M.M.Bonierbale, Merideth W.Kresovich, SFregene, Martin A.Tohme, Joseph M.Kochert, G[Microsatellites in cassava (Manihot esculenta Crantz) : discovery, inheritance and variability]Microsatellites in cassava (Manihot esculenta Crantz) : discovery, inheritance and variability
Akinbo, OlalekanLabuschagne, MarykeFregene, Martin A.[Introgression of root protein and yield traits from backcross hybrids between cassava and its wild progenitor (Manihot esculenta ssp flabellifolia)]Introgression of root protein and yield traits from backcross hybrids between cassava and its wild progenitor (Manihot esculenta ssp flabellifolia)
Fregene, Martin A.Morante, NSánchez, T.Marin, JAOspina, C.Barrera Sabogal, EGutiérrez A., Janeth PatriciaGuerrero, JMBellotti, Anthony C.Santos Melendez, LGAlzate Gutiérrez, A.M.Moreno, SCeballos, H.[Molecular markers for introgression of useful traits from wild manihot relatives of cassava, marker-assisted selection (MAS) of disease and root quality traits]Molecular markers for introgression of useful traits from wild manihot relatives of cassava, marker-assisted selection (MAS) of disease and root quality traits

We evaluated cassava bacterial blight (CBB) infection in an pair-cross population of 150 individuals derived from an intra-specific cross between two non-inbred cassava (Manihot esculenta Crantz) lines. The replicated trials were carried out in the field under high disease pressure over two conse...


Jorge, VFregene, Martin A.Velez, C.M.Duque E., Myriam CristinaTohme, Joseph M.Verdier, Valérie[QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava]QTL analysis of field resistance to Xanthomonas axonopodis pv. manihotis in cassava

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