Tolerancia del arroz a la temperatura baja
Tolerance of rice to low temperatures The damages caused to rice crops by low temperatures and cold are reviewed, and crop symptoms are indicated. The results of genetic improvement efforts regarding cold tolerance in rice are also discussed. Low temperatures limit rice production in the tropical an...
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| Format: | Book Chapter |
| Language: | Español |
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International Center for Tropical Agriculture
2010
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/82501 |
| _version_ | 1855533355356913664 |
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| author | Cruz Gallego, Maribel |
| author_browse | Cruz Gallego, Maribel |
| author_facet | Cruz Gallego, Maribel |
| author_sort | Cruz Gallego, Maribel |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Tolerance of rice to low temperatures The damages caused to rice crops by low temperatures and cold are reviewed, and crop symptoms are indicated. The results of genetic improvement efforts regarding cold tolerance in rice are also discussed. Low temperatures limit rice production in the tropical and subtropical upland areas of temperate zones. The effects of cold temperatures during different stages of plant development include reduced yields, extended vegetative cycle, and deteriorated grain quality. The nature and extent of the damages caused to the crop will depend, among other factors, on the duration and intensity of the cold spell as well as on the stage of the crop when low temperatures occur. One way to deal with adverse climatic conditions is by using varieties tolerant to this type of stress. Rice improvement programs in the southernmost part of Latin America are selecting germplasm for tolerance to cold conditions at different phenological stages. This is usually done by exposing the germplasm to natural conditions—a methodology that works but is both expensive and time-consuming. The Latin American Fund for Irrigated Rice (FLAR) has recently developed several procedures under controlled conditions to accelerate germplasm selection. This strategy combines the cold tolerance of japonica rice with the yield potential and grain quality of indica rice. This objective has been persistently pursued by different agricultural research organizations in the affected areas. As a result, since 2001 one of FLAR’s programs has focused on combining high yields with cold tolerance to offer useful rice germplasm to its partners in temperate areas of South America, where the cold climate represents an ongoing threat to this crop. |
| format | Book Chapter |
| id | CGSpace82501 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace825012025-11-05T17:02:52Z Tolerancia del arroz a la temperatura baja Cruz Gallego, Maribel oryza sativa temperature resistance cold tolerance genotypes resistencia a la temperatura tolerancia al frío fitomejoramiento genotipos Tolerance of rice to low temperatures The damages caused to rice crops by low temperatures and cold are reviewed, and crop symptoms are indicated. The results of genetic improvement efforts regarding cold tolerance in rice are also discussed. Low temperatures limit rice production in the tropical and subtropical upland areas of temperate zones. The effects of cold temperatures during different stages of plant development include reduced yields, extended vegetative cycle, and deteriorated grain quality. The nature and extent of the damages caused to the crop will depend, among other factors, on the duration and intensity of the cold spell as well as on the stage of the crop when low temperatures occur. One way to deal with adverse climatic conditions is by using varieties tolerant to this type of stress. Rice improvement programs in the southernmost part of Latin America are selecting germplasm for tolerance to cold conditions at different phenological stages. This is usually done by exposing the germplasm to natural conditions—a methodology that works but is both expensive and time-consuming. The Latin American Fund for Irrigated Rice (FLAR) has recently developed several procedures under controlled conditions to accelerate germplasm selection. This strategy combines the cold tolerance of japonica rice with the yield potential and grain quality of indica rice. This objective has been persistently pursued by different agricultural research organizations in the affected areas. As a result, since 2001 one of FLAR’s programs has focused on combining high yields with cold tolerance to offer useful rice germplasm to its partners in temperate areas of South America, where the cold climate represents an ongoing threat to this crop. Se revisan los daños causados por las temperaturas bajas y el frío al cultivo del arroz, la sintomatología del daño y las investigaciones en mejoramiento genético con respecto a la tolerancia del frío. Las temperaturas bajas limitan la producción de arroz en las tierras altas de los trópicos y en las franjas subtropicales de las zonas templadas. Por los daños que causa el frío en varias etapas del desarrollo de las plantas, reducen el rendimiento del cultivo, alargan su ciclo vegetativo y deterioran la calidad del grano. La naturaleza de estos daños y su alcance en el tiempo dependen, entre otros factores, de la duración del período frío, de la intensidad del frío y de la etapa en que se halla el cultivo. Una forma de manejar esta adversidad climática es la tolerancia varietal de este tipo de estrés. Los programas de mejoramiento en el Cono Sur de América Latina hacen selección por tolerancia del frío en diferentes estados fenológicos. Generalmente, lo hacen por exposición del germoplasma a condiciones naturales, una metodología que funciona pero es costosa y lenta. Recientemente, el FLAR (Fondo Latinoamericano para Arroz de Riego) desarrolló algunos procedimientos en condiciones controladas para acelerar la selección de germoplasma, en los que combinó la tolerancia del frío del arroz tipo Japónica con el potencial de rendimiento y la calidad del arroz tipo Índica. Este objetivo ha sido perseguido constantemente por diversas organizaciones de investigación agrícola en las áreas afectadas. Por eso, el FLAR, desde el 2001, trabaja en un programa cuyo objetivo principal es combinar el alto rendimiento con la tolerancia del frío para ofrecer germoplasma útil a los socios ubicados en la zona templada de América del Sur donde el frío es una permanente amenaza del cultivo de arroz. 2010 2017-06-20T09:02:29Z 2017-06-20T09:02:29Z Book Chapter https://hdl.handle.net/10568/82501 es Open Access application/pdf International Center for Tropical Agriculture Cruz, Maribel. 2010. Tolerancia del arroz a la temperatura baja . In: Degiovanni Beltramo, Víctor M.; Martínez Racines, César P.; Motta O., Francisco (eds.). Producción eco-eficiente del arroz en América Latina . Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. p. 180-190. (Publicación CIAT no. 365) |
| spellingShingle | oryza sativa temperature resistance cold tolerance genotypes resistencia a la temperatura tolerancia al frío fitomejoramiento genotipos Cruz Gallego, Maribel Tolerancia del arroz a la temperatura baja |
| title | Tolerancia del arroz a la temperatura baja |
| title_full | Tolerancia del arroz a la temperatura baja |
| title_fullStr | Tolerancia del arroz a la temperatura baja |
| title_full_unstemmed | Tolerancia del arroz a la temperatura baja |
| title_short | Tolerancia del arroz a la temperatura baja |
| title_sort | tolerancia del arroz a la temperatura baja |
| topic | oryza sativa temperature resistance cold tolerance genotypes resistencia a la temperatura tolerancia al frío fitomejoramiento genotipos |
| url | https://hdl.handle.net/10568/82501 |
| work_keys_str_mv | AT cruzgallegomaribel toleranciadelarrozalatemperaturabaja |