Specific character improvement

Abstract

Research carried out by CIAT on specific character improvement is described and the results obtained in the following studies are given: resistance to viral (BCMV, combined BCMV and BYMV, bean chlorotic mottle virus, and BGMV), fungal (anthracnose, angular leaf spot, rust, and web blight), and bacterial diseases (halo blight and common bacterial blight), and to pests (Empoasca kraemeri, Zabrotes subfasciatus, Acanthoscelides obtectus, and Apion godmani); yield and plant architecture improvement; material selection for tolerance to moderately acid soils and to water stress, and for potential for N fixation; variability from interspecific hybridization. Several special studies were carried out on heterosis, hybrid dwarfism, and starch accumulation in stems and roots. (CIAT)

Se describen las investigaciones realizadas por CIAT sobre mejoramiento del caracter especifico y se presentan los resultados obtenidos sobre: resistencia a enfermedades virales (BCMV, combinacion de BCMV y BYMV, virus del moteado clorotico del frijol y BGMV), fungicas (antracnosis, mancha foliar angular, roya y mustia hilachosa) y bacterianas (anublo de halo y anublo bacteriano comun), y a plagas (Empoasca kraemeri, Zabrotes subfasciatus, Acanthoscelides obtectus y Apion godmani); mejoramiento del rendimiento y la arquitectura de la planta; seleccion de materiales por tolerancia a suelos moderadamente acidos y al deficit hidrico y por potencial de fijacion de N; variabilidad de la hibridacion interespecifica. estudios especiales sobre heterosis, enanismo del hibrido F1 y acumulacion de almidon en los tallos y raices. (CIAT)