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In 1985, the activities of the Biotechnology Research Unit (CIAT) involved research in cell and tissue culture for clonal propagation and for the generation of useful variability. These activities included work carried out at CIAT and at collaborating institutions abroad. Work at CIAT concentrate...

En 1985, las actividades de la Unidad de Investigacion en Biotecnologia (CIAT) incluyeron la investigacion sobre el cultivo de celulas y de tejidos para la propagacion clonal y para la generacion de variabilidad util. Estas actividades incluyeron trabajos realizados en CIAT y en las instituciones...

CIAT's bean database was designed to deal with 2 main groups of data: the identification and origins of bean accessions and their characteristics. The 1st category is nearly complete, in terms of both storing data previously held in other files and of providing an on-line data management system. ...

La base de datos de frijol del CIAT se diseno para el manejo de 2 grupos principales de datos: la identificacion y el origen de las accesiones de frijol y sus caracteristicas. La primera categoria esta casi completa, en terminos del almacenamiento de datos que pertenecian a otros archivos y en pr...

During 1984 a collaborative research effort between CIAT and the National Vegetable Research Station (Wellesbourne, England) was started to broaden the knowledge of halo blight caused by Pseudomonas phaseolicola. Isolates of the halo blight pathogen were collected from bean growing areas of Latin...

Durante 1984 se inicio un esfuerzo de investigacion coloborativo entre CIAT y National Vegetable Research Station (Wellesbourne, Inglaterra), para ampliar el conocimiento del anublo de halo causado por Pseudomonas phaseolicola. Se recolectaron aislamientos del patogeno del anublo de halo en areas...

The main activities of bean virology at CIAT in 1984 involved screening for BCMV dominant resistance (selection of homozygous BCMV resistant lines), BCMV multiple gene resistance, BCMV recessive gene immunity, and the management and prognosis of other important viral diseases of beans involving t...

Las principales actividades sobre virologia de frijol en CIAT durante 1984 incluyeron seleccion por resistencia dominante al BCMV (seleccion de lineas homocigotas resistentes), por resistencia multiple de genes al BCMV, por inmunidad al gen recesivo de BCMV y el manejo y pronostico de otras enfer...

During 1984 evaluations for resistance to Empoasca kraemeri, Apion godmani, and seed-infesting bruchids were continued. Some bean accessions were also evaluated for their reaction to the slug Vaginulus plebeius. Several red-and white-seeded selections from crosses for resistance to E. kraemeri re...

Durante 1984 se realizaron evaluaciones por resistencia a Empoasca kraemeri, Apion godmani y gorgojos que infestan la semilla. Tambien se evaluaron algunas accesiones de frijol por su reaccion a la babosa Vaginulus plebeius. Algunas selecciones de semilla blanca y roja de los cruzamientos por res...

Although lateness will continue to be sought as a route to absolute max. yield in the CIAT Bean Program, overall work on yield potential is also being directed toward other groups of materials including medium- and large-seeded lines and early maturing lines. It has consistently been observed tha...

Aunque se continuara buscando la madurez tardia como una via al rendimiento max. absoluto en el Programa de Frijol del CIAT, el trabajo en general sobre potencial de rendimiento tambien se esta dirigiendo hacia otros grupos de materiales que incluyen lineas de semilla mediana y grande y lineas de...

In the 2nd growing season of 1984, reduced no. of materials were used to evaluate the present screening strategy and study mechanisms of drought tolerance. The new materials evaluated included 14 lines from the Brazilian national program, 100 lines from EP/84, and 3 Phaseolus vulgaris x P. acutif...

En la segunda estacion de crecimiento de 1984, se utilizo un no. reducido de materiales para evaluar la estrategia de seleccion actual y estudiar los mecanismos de tolerancia a la sequia. Los nuevos materiales evaluados incluyeron 14 lineas del progama nacional del Brasil, 100 lineas de EP/84 y 3...

Photoperiod screening has continued at CIAT-Palmira throughout 1984 using 18 h daylengths to delay flowering. Materials evaluated included lines from various EP and the germplasm collection and the results from previous screening efforts have been compiled into a list of photoperiod responses of ...

Durante 1984 continuo la seleccion por fotoperiodo en CIAT- Palmira utilizando longitudes del dia de 18 h para retardar la floracion. Los materiales evaluados incluyeron lineas de varios EP y la coleccion de germoplasma; los resultados de esfuerzos de seleccion anteriores se han compilado en una ...

In 1984, CIAT continued the selection of bean germplasm tolerant to acid soils under low P and high Al conditions. A 3- stage screening system was used for bean lines from Central American adaptation nurseries, BGMV lines, pre-VEF lines, and advanced lines of the EP 84. Screening was done in rand...

En 1984, CIAT continuo la seleccion de germoplasma de frijol tolerante a suelos acidos en condiciones de bajo P y alto Al. Se utilizo un sistema de seleccion de 3 etapas para lineas de frijol de viveros de adaptacion de America Central, lineas de BGMV y lineas antes de pasar al VEF y lineas avanz...

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...