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Autor: Davis, J.H.C.

Three trials were carried out at CIAT-Palmira to quantify the effect of plot edges and useful plot size in beans. In the 1st trial (sown in Oct. 1977), the competition effect of 36 climbing bean var. associated with maize ICA H-210 in adjacent plots and the effect of the alleys on plot edges were...


Davis, J.H.C.[Metodologia de la investigacion aplicada a la asociacion frijol- maiz]Metodologia de la investigacion aplicada a la asociacion frijol- maiz

Angulo, NDavis, J.H.C.Singh, Shree P.[Informe de trabajos 1979-1980: programa de fríjol]Informe de trabajos 1979-1980: programa de fríjol
Autor: Davis, J.H.C.

The results are presented of 3 expt conducted at CIAT to improve var. destined for use in multiple-cropping systems; (1) evaluation of bean var. (bush and climbing) in 2 cropping systems, monoculture and in association with maize; (2) evaluation of 20 maize genotypes in monoculture and in associa...


Davis, J.H.C.[Interacciones de genotipos por sistema de cultivo en frijol y maiz]Interacciones de genotipos por sistema de cultivo en frijol y maiz
Autor: Davis, J.H.C.

Some basic definitions on genetics in relation to bean cultivation are presented in which a description is given on how to use this information in a breeding program. Examples are given on the management of quantitative characters (yield and plant height) controlled by different genes and qualita...


Davis, J.H.C.[Conceptos basicos de genetica de frijol]Conceptos basicos de genetica de frijol

Davis, J.H.C.Pérez Padrón, A.V.Hopmans, S[Early generation yield testing in beans in monoculture and intercropped with maize]Early generation yield testing in beans in monoculture and intercropped with maize
Autor: Davis, J.H.C.

The method of selection used by CIATs climbing bean program is between the pedigree method (lineage) and the bulk population method. This method reduces the variation of each hybrid population in F, by individual selection. The evaluation of the germplasm bank was conducted in Popayan (1850 m abo...


Davis, J.H.C.[Orientacion del mejoramiento de frijoles volubles]Orientacion del mejoramiento de frijoles volubles

Photoperiod insensitivity in the germplasm collection of beans (Phaseolus vulgaris) held at CIAT is found mostly in accessions from higher latitudes. Cold tolerance is found in accessions from the high Andes, but these are all photoperiod sensitive. A break in adaptation seems to occur at about 1...


Davis, J.H.C.Gniffke, P[The effect of photoperiod and temperature on yield in beans]The effect of photoperiod and temperature on yield in beans

One thousand and forty-eight Phaseolus bean accessions were evaluated for resistance to six races of Pseudomonas syringae pv. phaseolicola. The accessions originated from regions of the Americas and Africa where the disease is important and included wild type accessions and some known resistance ...


Taylor, JDTeverson, D.M.Davis, J.H.C.[Sources of resistance to Pseudomonas syringae pv. phaseolicola races in Phaseolus vulgaris]Sources of resistance to Pseudomonas syringae pv. phaseolicola races in Phaseolus vulgaris

Bean germplasm was evaluated at CIAT for resistance to BCMV strains NL-4, NL-3, and NL-5 in order to use them in the national breeding and selection programs in Africa, Europe, USA, and Chile. Ninety-eight lines were selected for an international Bean Common Mosaic/Black Root resistance nursery. ...


Davis, J.H.C.Morales, Francisco JoséCastaño, M.[Resistance to black root]Resistance to black root

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