Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT
Tropical corn populations tolerant to acid soils. Currently, five tropical maize populations from CIMMYT are being bred for tolerance to acid soils through a full-sib recurrent selection scheme. Three cycles of selection from each population were evaluated in a split-plot design, with a varied numbe...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Español |
| Published: |
1994
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/44393 |
| _version_ | 1855536048296165376 |
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| author | Ceballos, H. Pandey, S. Knapp, E.B. Duque, J.V. |
| author_browse | Ceballos, H. Duque, J.V. Knapp, E.B. Pandey, S. |
| author_facet | Ceballos, H. Pandey, S. Knapp, E.B. Duque, J.V. |
| author_sort | Ceballos, H. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Tropical corn populations tolerant to acid soils. Currently, five tropical maize populations from CIMMYT are being bred for tolerance to acid soils through a full-sib recurrent selection scheme. Three cycles of selection from each population were evaluated in a split-plot design, with a varied number of replications under five environments (with normal soils, and the remaining four with varying degrees of soil stress). The observed genetic gains from these populations were highly significant: 4.72 % per cycle at all environments, 4.90% per cycle in acid soil environments (LSA), and 4.21 % per cycle for the normal soil location (LNA). The results suggest adequate genetic variability and high heritability for tolerance to soil acidity. In comparative trials, these populations yielded anaverage of 2.29 and 6.25 t/ha in the three LSA and two LNA environments, respectively. Under the same environments, the controls used (Tuxpeño, Pool 26 and Suwan-1) yielded anaverage of 1.28 and 5.56 t/ha. |
| format | Journal Article |
| id | CGSpace44393 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 1994 |
| publishDateRange | 1994 |
| publishDateSort | 1994 |
| record_format | dspace |
| spelling | CGSpace443932025-05-15T09:40:30Z Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT Ceballos, H. Pandey, S. Knapp, E.B. Duque, J.V. zea mays recurrent selection resistance to injurious factors acid soils soil toxicity aluminium crop yield selección recurrente resistencia a agentes dañinos suelo ácido toxicidad del suelo aluminio rendimiento de cultivos Tropical corn populations tolerant to acid soils. Currently, five tropical maize populations from CIMMYT are being bred for tolerance to acid soils through a full-sib recurrent selection scheme. Three cycles of selection from each population were evaluated in a split-plot design, with a varied number of replications under five environments (with normal soils, and the remaining four with varying degrees of soil stress). The observed genetic gains from these populations were highly significant: 4.72 % per cycle at all environments, 4.90% per cycle in acid soil environments (LSA), and 4.21 % per cycle for the normal soil location (LNA). The results suggest adequate genetic variability and high heritability for tolerance to soil acidity. In comparative trials, these populations yielded anaverage of 2.29 and 6.25 t/ha in the three LSA and two LNA environments, respectively. Under the same environments, the controls used (Tuxpeño, Pool 26 and Suwan-1) yielded anaverage of 1.28 and 5.56 t/ha. Cinco poblaciones de maíz tropical del CIMMYT están siendo mejoradas para tolerancia a suelos ácidos mediante selección recurrente de hermanos completos. Se evaluaron tres ciclos de selección en un diseño de parcela dividida, con número variable de repeticiones, en cinco ambientes edáficos: uno con suelos normales (LNA) y los restantes cuatro con grados variables de estrés edáfico (LSA). Las ganancias genéticas observadas a través de las poblaciones fueron altamente significativas: 4,72 % por ciclo, cuando los cinco ambientes fueron considerados, de 4,90 % por ciclo cuando se consideraron únicamente las localidades LSA y de 4,21 % por ciclo para el ambiente LNA. Los resultados obtenidos sugie-ren buena variabilidad genética y alta heredabilidad de la tolerancia a los suelos ácidos. En ensayos comparativos de rendimiento, estas poblaciones rindieron un promedio de 2,29 y 6,25 t/ha en tres ambientes LSA y dos ambientes LNA, respectivamente. En estos mismos ambientes los testigos usados (Tuxpeño, Pool 26, y Suwan-1), rindieron un promedio de 1,28 y 5,56 t/ha. 1994 2014-10-02T08:33:42Z 2014-10-02T08:33:42Z Journal Article https://hdl.handle.net/10568/44393 es Open Access |
| spellingShingle | zea mays recurrent selection resistance to injurious factors acid soils soil toxicity aluminium crop yield selección recurrente resistencia a agentes dañinos suelo ácido toxicidad del suelo aluminio rendimiento de cultivos Ceballos, H. Pandey, S. Knapp, E.B. Duque, J.V. Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT |
| title | Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT |
| title_full | Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT |
| title_fullStr | Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT |
| title_full_unstemmed | Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT |
| title_short | Tolerancia a suelos ácidos en poblaciones tropicales de maíz del CIMMYT |
| title_sort | tolerancia a suelos acidos en poblaciones tropicales de maiz del cimmyt |
| topic | zea mays recurrent selection resistance to injurious factors acid soils soil toxicity aluminium crop yield selección recurrente resistencia a agentes dañinos suelo ácido toxicidad del suelo aluminio rendimiento de cultivos |
| url | https://hdl.handle.net/10568/44393 |
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