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Se evaluó la resistencia de los padres y las progenies de la familia de yuca K (M Nga 2 x CM 2177-2), a Phytophthora tropicalis. Además de los parentales se inocularon raíces frescas de 69 individuos de la familia K. Con la evaluación fenotípica y con base en las mapas moleculares de M Nga 2 (Mad...


Loke, John BernardÁlvarez, E.Vallejo Cabrera, Franco AlirioMarin, JFregene, Martin A.Rivera, SLlano Rodríguez, Germán AlbertoPineda López, Benjamín[Análisis de QTLS de la resistencia a pudrición de raíz causada por Phytophthora tropicalis en una población segregante de yuca (Manihot esculenta Crantz)]Análisis de QTLS de la resistencia a pudrición de raíz causada por Phytophthora tropicalis en una población segregante de yuca (Manihot esculenta Crantz)

Screening of a tuber specific cassava cDNA library resulted in the isolation of full length cDNA clones with homology to the genes encoding the small and large subunits of ADP glucose pyrophosphoryalse. Sequence analysis revealed that AGPase B the clone with homology to the small subunit shared 5...


Munyikwa, TRIKreuze, J.F.Fregene, Martin A.Suurs, LJacobsen, EVisser, Richard G.F.[Isolation and characterisation of cDNAs encoding the large and small subnits of ADP-glucose pyrophosphorylase from cassava (Manihot esculenta Crantz)]Isolation and characterisation of cDNAs encoding the large and small subnits of ADP-glucose pyrophosphorylase from cassava (Manihot esculenta Crantz)

La población S1 de la variedad tailandesa de yuca MTAi8 (AM320), la cual presenta patrones de segregación definidos para el contenido de carotenos totales (Beta-caroteno), se sometió a un análisis de agrupamiento segregante (BSA = Bulk Segregant Analysis) empleando 700 marcadores moleculares tipo...


Marin Colorado, JARamírez, H.Fregene, Martin A.[Mapeo genético y análisis de QTL para carotenos en una población S1 de yuca = Genetic mapping and QTL analysis for carotenes in a S1 population of cassava]Mapeo genético y análisis de QTL para carotenos en una población S1 de yuca = Genetic mapping and QTL analysis for carotenes in a S1 population of cassava

Los genes de resistencia se buscaron mediante dos estrategias. La primera, por medio de hibridización con sondas de maíz y arroz, utilizando RFLP. La segunda consistió en la amplificación de regiones conservadas de ADN, con cebadores degenerados NBS y Pto kinasa, en tres genotipos de yuca resiste...


Llano Rodríguez, Germán AlbertoÁlvarez, E.Muñoz, J.E.Fregene, Martin A.[Identificación de genes análogos de resistencia a enfermedades en yuca, Manihot esculenta Crantz, y su relación con la resistencia a tres especies de Phytophthora]Identificación de genes análogos de resistencia a enfermedades en yuca, Manihot esculenta Crantz, y su relación con la resistencia a tres especies de Phytophthora

Cassava cultivars often have poor resistance to biotic stresses and lack good quality traits. Wild species of cultivated crops have frequently been used as an important source of genetic diversity. Cassava breeders are becoming increasingly interested in incorporating genes of wild relatives. In ...


Ojulong, HLabuschangne, M.Herselman, L.Fregene, Martin A.[Introgression of genes for dry matter content from wild cassava species]Introgression of genes for dry matter content from wild cassava species

En este artículo se revisa el estado del conocimiento sobre el metabolismo del almidón en las plantas superiores y específicamente los mecanis­mos de control y regulación de las rutas de síntesis y degradación. Se considera que para obtener almidones, mediante manipulación genética, es necesario ...


Tofiño Rivera, Adriana PatriciaFregene, Martin A.Ceballos, H.Cabal, D.[Regulación de la biosíntesis del almidón en plantas terrestres : Perspectivas de modificación = Regulation of starch biosynthesis in higher land plants : New avenues for modifying starch]Regulación de la biosíntesis del almidón en plantas terrestres : Perspectivas de modificación = Regulation of starch biosynthesis in higher land plants : New avenues for modifying starch

Breeding for resistant genotypes is the best strategy to offset the destructive effects of cassava mosaic disease (CMD) and cassava bacterial blight (CBB). Two sets of diallel parents were selected for the forest and the savannah ecological zones in Ghana based on good levels of resistance to CMD...


Parkes, E.Fregene, Martin A.Dixon, A.Boakye-Peprah, B.Labuschagne, M.T.[Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana]Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana

Cassava bacterial blight (CBB), caused by Xanthomonas axonopodis pv. manihotis (Xam), is a major disease of cassava (Manihot esculenta Crantz) in Africa and South America. Planting resistant varieties is the preferred method of disease control. Recent genetic mapping of an F1 cross (TMS 30572 × C...


Jorge, VFregene, Martin A.Duque E., Myriam CristinaBonierbale, Merideth W.Tohme, Joseph M.Verdier, Valérie[Genetic mapping of resistance to bacterial blight disease in cassava (Manihot esculenta Crantz)]Genetic mapping of resistance to bacterial blight disease in cassava (Manihot esculenta Crantz)

Cassava is one of the most planted tuber crops in the tropical world. The importance of cassava is growing as a food security crop in sub Saharan Africa, where malnutrition is a menace. However, a major hindrance in the fast improvement of the crop is the long generational cycle of cassava and po...


Akinbo, OlalekanLabuschangne, M.Fregene, Martin A.[Embryo rescue as a method to develop and multiply a backcross population of cassava (Manihot esculenta Crantz) from an interspecific cross of Manihot esculenta ssp. Flabellifolia]Embryo rescue as a method to develop and multiply a backcross population of cassava (Manihot esculenta Crantz) from an interspecific cross of Manihot esculenta ssp. Flabellifolia

Cassava (Manihot esculenta) is a tropical crop that is grown in Africa, Latin America and Southeast Asia. Cassava was introduced from Latin America into West and East Africa at two independent events. In Uganda a serious threat to cassava's survival is the cassava mosaic disease (CMD). Uganda has...


Kizito, E.B.Bua, A.Fregene, Martin A.Egwang, TGGullberg, U[The effect of cassava mosaic disease on the genetic diversity of cassava in Uganda]The effect of cassava mosaic disease on the genetic diversity of cassava in Uganda

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