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...
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| Formato: | Capítulo de libro |
| Lenguaje: | Español |
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International Center for Tropical Agriculture
1981
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/81631 |
| _version_ | 1855530207934414848 |
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| author | International Center for Tropical Agriculture |
| author_browse | International Center for Tropical Agriculture |
| author_facet | International Center for Tropical Agriculture |
| author_sort | International Center for Tropical Agriculture |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | 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) |
| format | Book Chapter |
| id | CGSpace81631 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 1981 |
| publishDateRange | 1981 |
| publishDateSort | 1981 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace816312025-11-05T17:01:18Z Desarrollo de germoplasma International Center for Tropical Agriculture 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 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) Durante 1981 se continuo la introduccion de germoplasma, especialmente 147 clones de Brasil en la forma de cultivo de meristemos. Se siguio la evaluacion del banco de germoplasma de yuca por su adaptacion, resistencia a enfermedades y plagas rendimiento y calidad de las raices en la Costa Norte de Colombia (Media Luna, Fonseca y Valledupar), Carimagua (Llanos Orientales), Popayan y Palmira. Las caracteristicas generales de las accesiones del germoplasma incluyen: bajo rendimiento potencial de la mayoria (bajo IC); baja frecuencia de accesiones con alta resistencia a cualquier enfermedad o plaga; muy baja frecuencia de accesiones con alta resistencia combinada a todas las enfermedades y plagas; limitado rango de adaptacion de una accesion. Existe mucha variabilidad por ser explotada en mejoramiento genetico. Se trabaja en la formacion de bancos de genes para cada zona edafoclimatica. Continuaron los estudios para determinar los sistemas mas eficientes de seleccion de generaciones tempranas por adaptacion a zonas edafoclimaticas productoras de yuca en Colombia. Se informa sobre los adelantos en la seleccion por precocidad, el uso de herbicidas para semillas y transplantes y la reevaluacion de accesiones por bajos niveles de HCN en las raices. (CIA 1981 2017-06-20T08:51:07Z 2017-06-20T08:51:07Z Book Chapter https://hdl.handle.net/10568/81631 es Open Access application/pdf International Center for Tropical Agriculture Desarrollo de germoplasma.1981.In: Centro Internacional de Agricultura Tropical. Programa de Yuca: Informe Anual 1981 . CIAT, Cali, CO. p. 127-146. |
| spellingShingle | 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 International Center for Tropical Agriculture Desarrollo de germoplasma |
| title | Desarrollo de germoplasma |
| title_full | Desarrollo de germoplasma |
| title_fullStr | Desarrollo de germoplasma |
| title_full_unstemmed | Desarrollo de germoplasma |
| title_short | Desarrollo de germoplasma |
| title_sort | desarrollo de germoplasma |
| topic | 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 |
| url | https://hdl.handle.net/10568/81631 |
| work_keys_str_mv | AT internationalcenterfortropicalagriculture desarrollodegermoplasma |