Desarrollo de germoplasma
During 1981 the introduction of germplasm was continued with an additional 147 clones from Brazil in the form of aseptic meristem cultures. Cassava germplasm bank evaluation for adaptation, resistance to diseases and pests, yield, and root quality is in progress in the north coast of Colombia (Media Luna, Fonseca, and Valledupar), Carimagua (Llanos Orientales), Popayan, and Palmira. General characteristics of germplasm accessions include: low yield potential of the majority of existing accessions (low HI); low frequency of accessions with high resistance to any given disease or pest; very low frequency of accessions having combined high resistance to all diseases and pests in a given region; limited range of adaptation of a given accession: much variability to be exploited in breeding exists. Gene pools are being formed for each edaphoclimatic zone. Studies on methods for improving selection efficiency by early generation selection within cassava-growing edaphoclimatic zones in Colombia are being continued. Advances in screening for early maturity, the use of herbicide mixtures for seeds and transplants, and the reevaluation of accessions selectedfor low root HCN levels are reported. (CIAT)
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| Format: | Book Chapter biblioteca |
| Language: | Spanish / Castilian |
| Published: |
International Center for Tropical Agriculture
1981
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| Subjects: | manihot esculenta, adaptation, bacterial diseases, composition, cultivars, development, developmental stages, diseases and pathogens, dry matter, germination, germplasm, harvest index, injurious mites, leaves, mycoses, noxious animals, phoma, productivity, propagation, resistance, root productivity, roots, seed, selection, soybean flour, sphaceloma manihoticola, xanthomonas campestris manihotis, cultivation, flours, pests, plant anatomy, propagation materials, adaptación, composicion, estadios de desarrollo, enfermedades y patogenos, materia seca, germinacion, acaros perjudiciales, propagacion, productividad de raices, raíces, harina de soya, |
| Online Access: | https://hdl.handle.net/10568/81631 http://ciat-library.ciat.cgiar.org/Articulos_ciat/2015/18969.pdf |
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