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Autor: Davis, J.

The process of selection in climbing bean improvement should be conducted with maize in association due to the high cost of sole cropping with stakes or with a trellis system. The relation between yields of beans and maize is negative and the regression coefficient is normally between -1 and -2. ...


Davis, J.[Relaciones de competencia entre frijol y maiz en sistemas de asociacion y sus inferencias para el mejoramiento genetico]Relaciones de competencia entre frijol y maiz en sistemas de asociacion y sus inferencias para el mejoramiento genetico

Different assays on climbing beans in relay cropping or associated with maize, N fixation and Rhizobium inoculation, and bush beans in monoculture are reported. These were conducted in La Selva, Antioquia (Colombia), through a collaborative project between the Instituto Colombiano Agropecuario (I...


Roman, ADavis, J.García, S.Graham, P.Temple, S[Informe de trabajos 1979: Convenio ICA-CIAT: Programa de frijol]Informe de trabajos 1979: Convenio ICA-CIAT: Programa de frijol

Roman V, ADavis, J.[Informe de trabajos 1980: Convenio ICA-CIAT, La Selva, Antioquia: Progama de frijol]Informe de trabajos 1980: Convenio ICA-CIAT, La Selva, Antioquia: Progama de frijol

A summary is presented of results of trials conducted as part of the collaborative agreement between the Instituto Colombiano Agropecuario and CIAT on bean research during 1981 in La Selva, Antioquia (Colombia). During germplasm evaluation, 112 promising materials were identified for their adapta...


Roman V, ADavis, J.[Informe de trabajos 1981: programa de frijol]Informe de trabajos 1981: programa de frijol

Studies were conducted at CIAT to test a new methodology (1) to improve F3, yields through the use of a hierarchical exptl design (a 9 x 9 lattice with 3 replications, with lines grouped according to the design, without taking into accont the family of origin) and (2) to select beans in associati...


Davis, J.García, S.Tejada, G[Seleccion en generaciones tempranas de frijoles volubles en asociacion con maiz]Seleccion en generaciones tempranas de frijoles volubles en asociacion con maiz

Maize and climbing beans as associated crops prevail in the highlands of L.A. in traditional systems with low populations and manual planting (in rows and pocket drilling). Two trials were establislied to compare the systems, testing bean densities from 4- 12 plants/m(2) and 3-12 plants/m(2), wit...


García, S.Davis, J.[Sistemas de siembra de maiz y frijol en asociación]Sistemas de siembra de maiz y frijol en asociación

Activities carried out by the Instituto Colombiano Agropecuario (ICA)-CIAT collaborative project on beans for cold climates in ICA`s regional center in Obonuco and in the dept. of Narino (Colombia) are reported. On the exptl. farm, 6233 materials were evaluated in bush bean trials, of which 103 w...


Vermeulen, J.Davis, J.[Informe de trabajos 1981/1982. Programa de frijol]Informe de trabajos 1981/1982. Programa de frijol

Lynam, John K.Davis, J.Prasad, C.S.Russo, S.L.[Context is everything: A CCER on Impact Assessment at the International Livestock Research Institute (ILRI)]Context is everything: A CCER on Impact Assessment at the International Livestock Research Institute (ILRI)

Cyanobacteria are a cheap source of nitrogen and quite suitable for farmers of developing countries. Although, they live in a diverse range of environments, different environmental variables influence their nitrogen fixing ability. Thus, this study evaluated the effect of pond depth and lining pl...


Tsedeke, A.Degefu, T.Woldemeskel, EndalkachewDavis, J.[Effect of pond depth and lining plastic color on growth and nitrogen fixing capacity of the cyanobacteria, Anabaena sp. E3]Effect of pond depth and lining plastic color on growth and nitrogen fixing capacity of the cyanobacteria, Anabaena sp. E3
Autor: Davis, J.

The backcrossing method is the most appropriate to incorporate resistance to BCMV, anthracnose, and halo blight without affecting snap bean quality. When improvement is less specific and includes characteristics such as plant adaptation, yield, and stand, it is possible to use the reccurrent scre...

El metodo de retrocruzamiento es el mas apropiado para incorporar resistencia a BCMV, antracnosis y anublo de halo sin alterar la calidad de la habichuela. Cuando el mejoramiento es menos especifico e incluye caracteristicas como adaptacion, rendimiento y porte de la planta se puede utilizar el m...


Davis, J.[Estrategias para el mejoramiento de la produccion de habichuelas: Control de mosaico comun, antracnosis, bacteriosis comun y anublo de halo]Estrategias para el mejoramiento de la produccion de habichuelas: Control de mosaico comun, antracnosis, bacteriosis comun y anublo de halo

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