Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem
Since 1996, the collaborative project between CIRAD (Agricultural Research Centre for International Development) and CIAT (Centro Internacional de Agricultura Tropical) has gradually phased out intra-specific tropical japonica conventional crossbreeding activities and concentrated on rice genetic ba...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
2008
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| Online Access: | https://hdl.handle.net/10568/44206 |
| _version_ | 1855531159192076288 |
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| author | Chatel, M Ospina Rey, Yolima Rodríguez, F. Lozano, VH Delgado, H. |
| author_browse | Chatel, M Delgado, H. Lozano, VH Ospina Rey, Yolima Rodríguez, F. |
| author_facet | Chatel, M Ospina Rey, Yolima Rodríguez, F. Lozano, VH Delgado, H. |
| author_sort | Chatel, M |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Since 1996, the collaborative project between CIRAD (Agricultural Research Centre for International Development) and CIAT (Centro Internacional de Agricultura Tropical) has gradually phased out intra-specific tropical japonica conventional crossbreeding activities and concentrated on rice genetic base broadening. The development and enhancement by recurrent selection of upland rice composite populations are the new breeding strategies. Using a recessive male-sterile gene (ms), the development of rice population was made easier. In Colombia, upland basic composite populations were enhanced using two recurrent selection-breeding methods: mass recurrent selection and S2 progenies evaluation. At each enhancement cycle, fertile plants are selected for the development of segregating lines and progeny selection using the conventional pedigree method. The most advanced lines are evaluated in yield trials by the project and in collaboration with the Colombian research organization -Corpoica Regional 8, in Villavicencio, Colombia. Promising lines having good adaptation to acid soils were identified. One promising line, extracted from the first cycle of recurrent selection of the composite population PCT-4, shows a higher yield potential with the same earliness of the best commercial check (Línea 30), developed by conventional crossbreeding. |
| format | Journal Article |
| id | CGSpace44206 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| record_format | dspace |
| spelling | CGSpace442062025-05-15T09:40:26Z Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem Chatel, M Ospina Rey, Yolima Rodríguez, F. Lozano, VH Delgado, H. oryza sativa rice upland rice recurrent selection savannas arroz arroz de secano selección recurrente sabanas Since 1996, the collaborative project between CIRAD (Agricultural Research Centre for International Development) and CIAT (Centro Internacional de Agricultura Tropical) has gradually phased out intra-specific tropical japonica conventional crossbreeding activities and concentrated on rice genetic base broadening. The development and enhancement by recurrent selection of upland rice composite populations are the new breeding strategies. Using a recessive male-sterile gene (ms), the development of rice population was made easier. In Colombia, upland basic composite populations were enhanced using two recurrent selection-breeding methods: mass recurrent selection and S2 progenies evaluation. At each enhancement cycle, fertile plants are selected for the development of segregating lines and progeny selection using the conventional pedigree method. The most advanced lines are evaluated in yield trials by the project and in collaboration with the Colombian research organization -Corpoica Regional 8, in Villavicencio, Colombia. Promising lines having good adaptation to acid soils were identified. One promising line, extracted from the first cycle of recurrent selection of the composite population PCT-4, shows a higher yield potential with the same earliness of the best commercial check (Línea 30), developed by conventional crossbreeding. Em colaboração, desde 1996, CIRAD (Centre de Coopération Internacionale en Recherche Agronomique pour le Développment) e CIAT (Centro Internacional de Agricultura Tropical) desenvolvem atividades de melhoramento intra-populacional, para ampliar a base genética do arroz cultivado. O desenvolvimento de populações base (compostos) de arroz de terras altas, por meio de seleção recorrente, compõem as novas estratégias para se alcançar esse objetivo. Usando-se um gene recessivo de machoesterilidade (ms), essas populações têm sido desenvolvidas facilmente. Na Colômbia, essas populações de arroz têm sido melhoradas por dois procedimentos de seleção recorrente: seleção massal e de progênies S2. Em cada ciclo de seleção, plantas férteis são selecionadas para o desenvolvimento de linhagens segregantes e para a seleção de progênies, usando-se o método convencional de pedigree. As linhagens avançadas são avaliadas em ensaios de rendimento, com apoio do projeto e em colaboração com a empresa colombiana de pesquisa - Corpoica Regional 8, em Villavicencio, Colômbia. Linhagens promissoras de boa adaptação a solos ácidos foram identificadas. Uma destas linhagens, extraída a partir do primeiro ciclo de seleção recorrente da população base PCT-4, mostra alto potencial de produtividade e mesmo nível de precocidade da melhor testemunha comercial (Línea 30), desenvolvida por melhoramento convencional. 2008 2014-10-02T08:33:25Z 2014-10-02T08:33:25Z Journal Article https://hdl.handle.net/10568/44206 en Open Access |
| spellingShingle | oryza sativa rice upland rice recurrent selection savannas arroz arroz de secano selección recurrente sabanas Chatel, M Ospina Rey, Yolima Rodríguez, F. Lozano, VH Delgado, H. Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem |
| title | Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem |
| title_full | Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem |
| title_fullStr | Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem |
| title_full_unstemmed | Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem |
| title_short | Upland rice composite population breeding and selection of promising lines for Colombian savannah ecosystem |
| title_sort | upland rice composite population breeding and selection of promising lines for colombian savannah ecosystem |
| topic | oryza sativa rice upland rice recurrent selection savannas arroz arroz de secano selección recurrente sabanas |
| url | https://hdl.handle.net/10568/44206 |
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