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Main activities conducted during 1986 regarding the improvement of individual characters in bean comprised the evaluation of several advanced and segregating bean nurseries for their reactions under field conditions to rust, angular leaf spot, anthracnose, common bacterial blight, and halo blight...

Las principales actividades realizadas durante 1986 en relacion con el mejoramiento de caracteres individuales en frijol comprendieron la evaluacion de algunos viveros de frijol avanzados y segregantes por sus reacciones en condiciones de campo a roya, mancha foliar angular, antracnosis, anublo b...

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...

During 1986, research emphasis was shifted to BGMV while BCMV research focused on the incorporation of blackroot resistance in African germplasm and the backcrossing of I gene into Latin American var. The identification of alternate host plant species for BGMV is critical in the understanding of ...

Durante 1986 el enfasis en investigacion se desplazo hacia BGMV en tanto que la investigacion sobre BCMV se enfoco hacia la incorporacion de la resistencia a la pudricion negra en el germoplasma africano y el retrocruzamiento del gen I a var. latinoamericanas. La identificacion de especies de pla...

Progress made in the genetic improvement of Phaseolus vulgaris through interspecific hybridization in 1986 included: (1) the implementation of an international yield trial for P. coccineus to assess the value of this crop, and make new germplasm available for direct use; (2) the identification of...

El avance logrado en mejoramiento genetico de Phaseolus vulgaris a traves de hibridacion interespecifica incluyo: 1) la puesta en practica de un ensayo internacional de rendimiento para P. coccineus para evaluar el valor de este cultivo y poner a disposicion nuevo germoplasma para uso directo; 2)...

During early 1986 computer programs were written to manage the expt. part of the bean database. In mid-year the programs were redesigned and recompiled to better access the data. In all, some 53 new dialogs were written to facilitate consultation of the bean database. All of the bean evaluation n...

A principios de 1986, se elaboraron programas de computador para manejar la parte de expt. de la base de datos de frijol. A mediados del mismo ano, se redisenaron y recopilaron dichos programas para tener un mejor acceso a los datos. En total, se elaboraron 53 dialogos para facilitar la consulta ...

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 ...

The principal activities carried out in 1986 in the nutrition and quality lab. are reported. A statistical analysis of all the parameters of acceptability on all bean materials evaluated in the lab. from 1981 to 1985 was executed. A joint project was carried out between CIAT and Instituto de Nutr...

Se informa sobre las principales actividades llevadas a cabo en 1986 en el lab. de nutricion y calidad. Se efectuo un analisis estadistico de todos los parametros de aceptabilidad en todos los materiales de frijol evaluados en el lab. desde 1981 hasta 1985. Se realizo un proyecto conjunto entre C...

Evaluation of photoperiod bean response in flowering screening continued at CIAT-Palmira, using artificial 18 h daylengths to delay flowering. Approx. 600 germplasm accessions were evaluated in 1986 as a part of continuing efforts to characterize responses of germplasm in different bean productio...

La evaluacion de la respuesta del frijol al fotoperiodo en la seleccion por floracion continuo en CIAT-Palmira, utilizando fotoperiodos artificiales de 18 h para retrasar la floracion. Se evaluaron aprox. 600 accesiones de germoplasma en 1986 como parte de esfuerzos continuos para caracterizar re...

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...

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...