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During 1986 screening of advanced bean lines for efficiency at low levels of P and for tolerance to high levels of Al saturation continued. A review of data from 8 yr. of screening indicated that the genetic variability of beans for these 2 characteristics is low. Furthermore, the data suggest th...

La seleccion de lineas avanzadas de frijol por eficiencia a bajos niveles de P y tolerancia a altos niveles de saturacion de Al continuo durante 1986. Una revision de datos de 8 anos de seleccion indico que la variabilidad genetica de frijol para estas 2 caracteristicas es baja. Ademas, los datos...

Close collaboration between CIAT and Brazil continued during 1986. Germplasm development was conducted through evaluating the jointly developed crosses in Brazil, rather than selecting the fixed lines in CIAT prior to shipment to Brazil. By the end of 1986, those segregating populations were in t...

La colaboracion estrecha entre CIAT y Brasil continuo durante 1986. Se realizo desarrollo de germoplasma a traves de la evaluacion de los cruzamientos desarrollados conjuntamente en Brasil, en lugar de seleccionar las lineas fijas en CIAT antes de su envio al Brasil. Hacia finales de 1986, estas ...

The Great Lakes Regional Bean Program works with the agricultural research institutions of Burundi, Rwanda, and Zaire. Advanced breeding lines were introduced as potential new var. for the region and/or as sources of resistance to angular leaf spot, anthracnose, Ascochyta leaf spot, halo and BCMV...

The Southern Africa Development Coordination Conference (SADCC) region covers Tanzania, Malawi, Zambia, Zimbabwe, Mozambique, Angola, Botswana, Lesotho, and Swaziland, and is the largest of the 3 regions hosting a CIAT bean program in Africa. Bean production from the SADCC region amounts to about...

La region de Southern Africa Development Coordination Conference (SADCC) comprende a Tanzania, Malawi, Zambia, Zimbabwe, Mozambique, Angola, Botswana, Lesotho y Swazilandia, y es la region mas grande de las 3 que tienen un programa de frijol de CIAT en Africa. La produccion de frijol de la region...

A total of 1407 advanced breeding lines entered Brazil in 1985. After inspection for the presence of unknown diseases, the advanced lines were field-evaluated for their adaptation to different environments. A list is given of the 10 best red/purple, black, cream, and red advanced lines and common...

Un total de 1407 lineas de mejoramiento avanzadas entraron al Brasil en 1985. Despues de la inspeccion por presencia de enfermedades desconocidas, las lineas avanzadas fueron evaluadas en el campo por su adaptacion a diferentes ambientes. Se presenta una lista de las 10 mejores lineas avanzadas r...

During 1984-85, 98 trials were planted by CIAT- Instituto Colombiano Agropecuario (ICA) in 4 areas of Colombia (eastern Antioquia and southern, central, and northern Narino). These trials were of 5 types: var., exploratory, determination of economic levels, verification, and farmer-managed. The e...

Durante 1984-85, CIAT-Instituto Colombiano Agropecuario (ICA) sembraron 98 ensayos en 4 areas de Colombia (Antioquia oriental, y sur, centro y norte de Narino). Estos ensayos fueron de 5 tipos: var., exploratorios, determinacion de niveles economicos, verificacion y de manejo por los agricultores...

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...

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...