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During the past 20 years of close collaboration with CIAT in the cassava breeding program in the Philippines, much has been achieved, not only in terms of human capacity building but also in the acquisition of improved cassava germplasm. These materials were used in a multy-year selection scheme,...

Cassava breeding and varietal dissemination in Vietnam initiated in 1975 after Vietnam was unified. The cassava program in Vietnam began to cooperate closely with CIAT and became part of the Asian Cassava Research Network in 1988. Thanks to the introduction of new highyielding varieties from Thai...

The cassava breeding program in Thailand started with the hybridization of local clones, followed by selection, at the Rayong Field Crops Research Center in 1975, and at Sri Racha Research Station of Kasetsart University in 1983. During this initial period of recombining genes available from a na...

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...

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 ...