Isolates of Sphaceloma manihoticola, the asexual stage of Elsinoe brasiliensis, were collected from several regions of south-central Brazil. The isolates were obtained from samples of leaves, stems, and petioles of cassava (Manihot esculenta) and the weedy Euphorbia heterophylla ( amendoim bravo ...
Álvarez, E.
,
Mejía De Los Rios, J.F.
,
Valle, T.L.
,
[Molecular and pathogenicity characterization of Sphaceloma manihoticola isolates from South-Central Brazil]
,
Molecular and pathogenicity characterization of Sphaceloma manihoticola isolates from South-Central Brazil
Cassava (Manihot esculenta Crantz) is a major staple crop in developing countries and a large source of raw material for industrial purposes as flour, starch, and ethanol. In July 2012, 24 cassava genotypes (corresponding to 1.85% of the accessions) with typical symptoms of frogskin disease (CFSD...
Oliveira, SAS
,
Abreu, EFM
,
Araújo, TS
,
Oliveira, EJ
,
Andrade, EC
,
García, J.M.P.
,
Álvarez, E.
,
[First report of a 16SrIII-L phytoplasma associated with frogskin disease in cassava (Manihot esculenta Crantz) in Brazil]
,
First report of a 16SrIII-L phytoplasma associated with frogskin disease in cassava (Manihot esculenta Crantz) in Brazil
Una de las principales estrategias para el manejo del Añublo Bacterial de la Yuca (CBB), causado por Xanthomonas axonopodis pv. manihotis es el uso de resistencia varietal, que implica desarrollar variedades de yuca con resistencia genética duradera. Para tal fin, es necesario conocer los genes q...
Hurtado Lopez, PX
,
Álvarez, E.
,
Llano Rodríguez, Germán Alberto
,
Fregene, Martin A.
,
[Detección de marcadores microsatélites asociados con la resistencia al añublo bacterial de la yuca (Manihot esculenta Crantz) en Colombia]
,
Detección de marcadores microsatélites asociados con la resistencia al añublo bacterial de la yuca (Manihot esculenta Crantz) en Colombia
Cassava is one of the main carbohydrate sources in the tropics, and it has worldwide importance as basic food for millions of persons in America and Africa. This root crop is affected by cassava frog skin disease that in Colombia produces yield losses of almost 90%. A phytoplasma was associated w...
Álvarez, E.
,
Mejía, Juan Fernando
,
Llano Rodríguez, Germán Alberto
,
Loke, John Bernard
,
[Detection and characterization of a phytoplasma associated with frog skin disease in cassava]
,
Detection and characterization of a phytoplasma associated with frog skin disease in cassava
There is a limited knowledge on the inheritance of traits with agronomic relevance in cassava. A diallel study among 10 parental clones was conducted in the acid-soils environment in the eastern savannas of Colombia. Thirty clones were obtained for each F1 cross. Each clone was represented by six...
Calle, F
,
Pérez Velásquez, Juan Carlos
,
Gaitan, W
,
Morante, N
,
Ceballos, H.
,
Llano Rodríguez, Germán Alberto
,
Álvarez, E.
,
[Diallel inheritance of relevant traints in cassava (Manihot esculenta Crantz) adapted to acid-soil savannas]
,
Diallel inheritance of relevant traints in cassava (Manihot esculenta Crantz) adapted to acid-soil savannas
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 Bernard
,
Álvarez, E.
,
Vallejo Cabrera, Franco Alirio
,
Marin, J
,
Fregene, Martin A.
,
Rivera, S
,
Llano Rodríguez, Germán Alberto
,
Pineda 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)
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 Alberto
,
Álvarez, 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
Una de las principales herramientas para el manejo de pudriciones radicales causadas por diversas especies de Phytophthora, es el uso de resistencia varietal, para lo cual se hace necesario entender la complejidad de la base genética de la yuca. Con este propósito, se evalué la resistencia de los...
Álvarez, E.
,
Loke, J
,
Rivera, S
,
Llano Rodríguez, Germán Alberto
,
[Genética de la resistencia a pudrición causada por Phytophthora tropicalis en dos poblaciones segregantes de yuca (Manihot esculenta Crantz)]
,
Genética de la resistencia a pudrición causada por Phytophthora tropicalis en dos poblaciones segregantes de yuca (Manihot esculenta Crantz)
Cassava frogskin disease (CFSD) is an economically important root disease of cassava (Manihot
esculenta) in Colombia and other South American countries, including Brazil, Venezuela, Peru,
Costa Rica, and Panama. The roots of severely affected plants are thin, making them unsuitable
for consumptio...
Álvarez, E.
,
Mejía De Los Rios, J.F.
,
Llano Rodríguez, Germán Alberto
,
Loke, John Bernard
,
Calari, A
,
Duduk, B
,
Bertaccini, A
,
[Characterization of a phytoplasma associated with frogskin disease in cassava]
,
Characterization of a phytoplasma associated with frogskin disease in cassava
The fungus Sphaceloma manihoticola causes superelongation disease in cassava, a starchy root crop grown widely in the tropics. Isolates were collected from infected plants grown in six localities of Colombia. Morphological analyses of the fungus showed that colony growth and color are not stable ...
Álvarez, E.
,
Molina, ML
,
[Characterizing the Sphaceloma fungus, causal agent of superelongation disease in cassava]
,
Characterizing the Sphaceloma fungus, causal agent of superelongation disease in cassava