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A descriptive and integrated look at the physiology of the bean plant is presented. Initially, the basic physiological processes that determine bean yields are discussed, namely (1) metabolic events such as photosynthesis, respiration, and N metabolism, which have a direct effect on growth, and (...

Drought substantially limits seed yield of common bean (Phaseolus vulgaris L.) in the tropics. Understanding the interaction of drought on yield and the nutrient concentration of the seed is vital in order to supply nutrition to the millions of consumers who rely on common bean as a staple crop. ...

The CIAT regional project in Peru has given max. priority to the improvement of bean var. Substantial progress was made in developing var. resistant to BCMV and rust (CIFAC 1277 and CIFAC 1288), with good adaptation in the Valle de Chincha. Another significant advance was the establishment of the...

El proyecto regional del CIAT en Peru ha dado max. prioridad al mejoramiento de las var. de frijol. Se logro un progreso substancial en el desarrollo de var. resistentes a BCMV y roya (CIFAC 1277 y CIFAC 1288), con buena adaptacion en el Valle de Chincha. Otro avance significativo fue el establec...

Two trials were conducted to screen germplasm for heat and drought tolerance. In the 1st, the performance of 25 genotypes under terminal drought stress was assessed. Lines A344, A268, A286, BAT 336, A442, BAT 477, Umvoti, and Domino were high-yielding (811, 750, 713, 717, 665, 659, 608, and 667 k...

Se realizaron 2 ensayos para seleccionar germoplasma por tolerancia al calor y a la sequia. En el primero, se evaluo el desempeno de 25 genotipos a estres de sequia terminal. Los genotipos con las producciones mas altas (kg/ha), tolerantes a calor y sequia, fueron A344 (811), A268 (750), A286 (71...

Primary emphasis is being placed on a search for genotypes with erect architecture adapted to narrow row spacings and high populations and which show marked yield increases under intensive agronomic management. This research strategy is complemented by studies on specific problems such as exploit...

Se ha dado enfasis fundamental a la busqueda de genotipos con arquitectura erecta, adaptados a espacios estrechos entre hileras y altas poblaciones y que muestren incrementos notables en rendimiento bajo manejo agronomico intensivo. Esta estrategia de investigacion se complementa con estudios sob...

During 1986 emphasis was given to testing promising bean germplasm for yields and the 1st materials bred at CIAT specifically for drought tolerance. Preliminary screening was performed under mild stress in the 1st semester, while exceptionally dry weather permitted evaluation under high levels of...

Durante 1986 se dio enfasis a pruebas de germoplasma promisorio de frijol por rendimiento y de los primeros materiales mejorados en CIAT especificamente por tolerancia a la sequia. La seleccion preliminar se efectuo en condiciones de estres leve en el primer semestre, en tanto que condiciones de ...

During 1986 emphasis was given to testing promising bean germplasm for yields and the 1st materials bred at CIAT specifically for drought tolerance. Preliminary screening was performed under mild stress in the 1st semester, while exceptionally dry weather permitted evaluation under high levels of...

Durante 1986 se dio enfasis a pruebas de germoplasma promisorio de frijol por rendimiento y de los primeros materiales mejorados en CIAT especificamente por tolerancia a la sequia. La seleccion preliminar se efectuo en condiciones de estres leve en el primer semestre, en tanto que condiciones de ...

Primary emphasis is being placed on a search for genotypes with erect architecture adapted to narrow row spacings and high populations and which show marked yield increases under intensive agronomic management. This research strategy is complemented by studies on specific problems such as exploit...

Se ha dado enfasis fundamental a la busqueda de genotipos con arquitectura erecta, adaptados a espacios estrechos entre hileras y altas poblaciones y que muestren incrementos notables en rendimiento bajo manejo agronomico intensivo. Esta estrategia de investigacion se complementa con estudios sob...

The most important characteristics of bean production systems in Aranzazu and Salamina (Caldas, Colombia) are summarized. Information collected in a survey detected the main constraints for bean cultivation in the area such as erosion, diseases, low density population, low-P and acid soils, and d...

Se resumen las caracteristicas importantes de los sistemas de produccion de frijol en Aranzazu y Salamina (Caldas, Colombia). Con base en la informacion recogida en una encuesta exploratoria, se detectaron los principales limitantes del cultivo del frijol en la zona como son erosion, enfermedades...

Results of 2 on-farm trials carried out in Peru during 1986 are presented in table form. In 1 of the trials, drought-tolerant bean var. were evaluated with 1 and 2 irrigation treatments. In the other trial, potentially rust- tolerant var. were evaluated at 2 plant densities. For drought condition...

Se presentan los resultados en forma de tabla de 2 ensayos realizados en Peru durante 1986. En un ensayo se evaluaron var. de frijol tolerantes a la sequia con 1 y 2 riegos. En el otro se evaluaron var. potencialmente tolerantes a roya a 2 densidades de siembra. Para sequia las var. promisorias f...