Existing bean variability and breeding activities at CIAT for new genetic combinations

Vista sencilla de ítem
dc.creatorTohme, Joseph M.
dc.date1989
dc.date2015-01-28T14:22:00Z
dc.date2015-01-28T14:22:00Z
dc.date.accessioned2026-06-27T14:37:26Z
dc.descriptionAssembled germplasm has provided breeders with valuable traits for the improvement of common beans. Molecular markers such as phaseolin and isozymes have facilitated understanding of the genus Phaseolus thus enabling breeders to develop more effective strategies. However, there are still gaps in the collections that have been assembled and in available information. Strategies for conservation need to be coordinated among international and national programs to prevent further genetic erosion of collected germplasm. Duplication of germplasm collections is vital. New sources of genetic variability not present in existing cultivars have been identified and transferred to adapted backgrounds. Wild accessions of P. vulgaris have provided genetic variability and sources of resistance not yet found in cultivated beans. At CIAT, the diversification of sources of resistance to several diseases and insects is well advanced. Broad and stable resistance is being sought. These new resistant sources are deployed through international nurseries which also serve to monitor pathogen variability. (AS)
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/55946
dc.identifier.urihttp://hdl.handle.net/123456789/83544
dc.languageen
dc.publisherSouthern Africa Development Coordination Conference (SADCC)
dc.publisherCentro Internacional de Agricultura Tropical (CIAT), Regional Programme on Beans in Southern Africa
dc.rightsOpen Access
dc.sourceTohme, J.M. 1989. Existing bean variability and breeding activities at CIAT for new genetic combinations. In: Smithson, J.B. (ed.). Workshop on Bean Varietal Improvement in Africa (1989, Maseru, Lesotho). Proceedings. Southern Africa Development Coordination Conference (SADCC); Centro Internacional de Agricultura Tropical (CIAT), Regional Programme on Beans in Southern Africa, Arusha, TZ. p. 9-22. (CIAT African workshop series no. 4)
dc.subjectphaseolus vulgaris
dc.subjectplant breeding
dc.subjectgermplasm
dc.subjectgenetic variation
dc.subjectgene pools
dc.subjectcultivars
dc.subjectselection
dc.subjectresistance
dc.subjectxanthomonas campestris phaseoli
dc.subjectcolletotrichum lindemuthianum
dc.subjectbean common mosaic virus
dc.subjectophiomyia
dc.subjectzabrotes subfasciatus
dc.subjectempoasca
dc.subjectascochyta
dc.subjectbacterial diseases
dc.subjectcoleoptera
dc.subjectdiseases and pathogens
dc.subjectinjurious insects
dc.subjectmycoses
dc.subjectnoxious animals
dc.subjectpests
dc.subjectviroses
dc.subjectfitomejoramiento
dc.subjectgermoplasma
dc.subjectvariacion genetica
dc.subjectreservas geneticas
dc.subjectvariedades
dc.subjectselección
dc.subjectresistencia
dc.subjectvirus del mosaico común frijol
dc.titleExisting bean variability and breeding activities at CIAT for new genetic combinations
dc.typeConference Paper

Archivos

Colecciones

Centro Internacional de Agricultura Tropical (CIAT)