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A simple test for evaluating membrane stability is briefly described. In a comparison of 12 lines representing groups identified for cold, drought, or heat tolerance, cold tolerance was associated with greater membrane damage, and heat-tolerant materials showed the least damage. Drought-tolerant ...

Se describe brevemente un ensayo simple para evaluar la estabilidad de la membrana. En una comparacion de 12 lineas representativas de grupos identificados por tolerancia al frio, sequia o calor, la tolerancia al frio se asocio con mayor dano de la membrana, mientras que los materiales tolerantes...

The CIAT Bean Program uses a 3-stage progeny evaluation program asfollows: (a) the VEF, which in 1984 contained 1004 entries distributed in 10 groups according to seed color and size, growth habit (bush or climbing), and climatic adaptation; (b) the EP, which consisted of 446 entries and 38 contr...

El Programa de Frijol del CIAT utiliza un programa de evaluacion de progenie de 3 etapas como sigue: a) el VEF, que en 1984 contenia 1004 entradas distribuidas en 10 grupos segun el color y tamano de la semilla, habito de crecimiento (arbustivo o voluble) y adaptacion climatica; b) el EP, que con...

Scientific training at CIAT continues to support the efforts of researchers particularly with respect to the training of technicians in the evaluation of promising germplasm. For training outside CIAT headquarters, greater emphasis was given to the study of limiting bean production factors at the...

La capacitacion cientifica en CIAT continua apoyando los esfuerzos de los investigadores, particularmente en relacion con la capacitacion de tecnicos para la evaluacion de germoplasma promisorio. En la capacitacion en sedes fuera de CIAT, el mayor enfasis se dio al estudio de los factores limitan...

The activities on character deployment involve the recombination or use of desirable characters (e.g., level of resistance to diseases and insect pests, tolerance to drought, ability to fix atmospheric N) in commercial cv., according to the needs of the particular production region for which the ...

Las actividades en despliegue de caracteres involucran la recombinacion o uso de caracteres deseables (como nivel de resistencia a enfermedades y plagas, tolerancia a sequia, capacidad fijadora de N atmosferico) en cv. comerciales, de acuerdo con las necesidades de la region productora especifica...

During 1984, intensive on-farm trials were conducted in northern, southern, and central Narino, Colombia, and emphasis was given to the continuation of var. trials and their expansion to determine economic levels and to verification trials. In northern and central Narino, a limited no. of verific...

Durante 1984 se realizaron intensos ensayos a nivel de finca en el norte, centro y sur de Narino, Colombia; se dio enfasis a la continuacion de los ensayos var. y a su expansion para determinar los niveles economicos y a los ensayos de verificacion. En el norte y centro de Narino se sembraron un ...

In 1984 the breeding for enhanced N fixation in agronomically acceptable bean cv. was continued. RIZ lines 10, 13, and 29 are performing well in international nurseries. They have high yield, good grain type, broad adaptation, and some disease resistance; however, it is difficult to assess if the...

En 1984, se continuo el mejoramiento para incrementar la fijacion de N en cv. de frijol agronomicamente aceptables. Las lineas RIZ 10, RIZ 13 y RIZ 29 se comportan bien en viveros internacionales. Presentan altos rendimientos, buen tipo de grano, amplia adaptacion y alguna resistencia a enfermeda...

In 1984 the nutrition and quality lab. evaluated 390 advanced lines from the EP 84 for seed quality, percentage of water absorbance from dry wt., presence of hard and broken seeds, av. cooking time, soup quality, and protein content. Results suggest that shiny grains tend to resist absorbing wate...

El lab. de nutricion y calidad en 1984 evaluo 390 lineas avanzadas provenientes de EP 84 en cuanto a calidad de la semilla, porcentaje de absorcion de agua a partir del peso seco, presencia de semillas duras y partidas, tiempo de coccion prom., calidad del caldo y contenido de proteina. Los resul...

Twenty-two bean genotypes were assessed in monoculture and in association with maize (NSCM 41) to identify germplasm genotypes from Bunda, Malawi, that synchronize maturity with the end of the growing season. Responses differed among the 3 trial sites (Ng'onga, Bunda, and Matapwata). In general, ...

Se evaluaron 22 genotipos de frijol en monocultivo y en asociacion con maiz (NSCM 41) para identificar genotipos del germoplasma de Bunda, Malawi, que sincronicen madurez con el final de la epoca de cultivo. Las respuestas difirieron entre los 3 sitios del ensayo: Ng'onga, Bunda y Matapwata. En g...

During 1984 several types of interspecific crosses between Phaseolus vulgaris and P. coccineus, generated in the collaborative project with the U. of Gembloux, Belgium, were tested to evaluate their yield potential. Significant differences were observed between the crosses tested and among sister...

Durante 1984 se estudiaron varios tipos de cruzamientos interespecificos entre Phaseolus vulgaris y P. coccineus generados en el proyecto colaborativo con la U. de Gembloux, Belgica, para evaluar su potencial de rendimiento. Se observaron diferencias significativas entre los cruzamientos evaluado...

The search for new sources of resistance to Empoasca kraemeri, Acanthoscelides obtectus, Zabrotes subfasciatus, and Apion godmani among bean germplasm materials continued in 1986. Special emphasis was placed on the study of mechanisms of resistance to E. kraemeri, A. obtectus, and Z. subfasciatus...

La busqueda de nuevas fuentes de resistencia a Empoasca kraemeri, Acanthoscelides obtectus, Zabrotes subfasciatus y Apion godmani entre materiales de germoplasma de frijol continuo en 1986. Se le dio especial enfasis al estudio de mecanismos de resistencia a E. kraemeri, A. obtectus y Z. subfasci...