Response to direct selection for grain yield under drought stress in rice
Drought is a major cause of yield loss in rain‐fed rice (Oryza sativa L.), grown on over 40 million ha in Asia. The objective of this study was to evaluate the effectiveness of direct selection for yield under drought stress in upland rice in populations derived from crosses between irrigated high‐y...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2007
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/166514 |
| _version_ | 1855524889716326400 |
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| author | Venuprasad, R. Lafitte, H.R. Atlin, G.N. |
| author_browse | Atlin, G.N. Lafitte, H.R. Venuprasad, R. |
| author_facet | Venuprasad, R. Lafitte, H.R. Atlin, G.N. |
| author_sort | Venuprasad, R. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Drought is a major cause of yield loss in rain‐fed rice (Oryza sativa L.), grown on over 40 million ha in Asia. The objective of this study was to evaluate the effectiveness of direct selection for yield under drought stress in upland rice in populations derived from crosses between irrigated high‐yielding cultivars and upland‐adapted cultivars. Random F2:4 lines from five populations were screened for grain yield in fully irrigated lowland fields under nonstress conditions and in uplands under severe reproductive‐stage drought stress. Stress caused mean yield reduction of 64% across populations. Broad‐sense heritability for yield was not consistently lower in stress than in nonstress trials. Response to selection was evaluated in two crosses in subsequent seasons. Stress‐selected lines had a yield advantage of 25 to 34% over random lines when evaluated at stress levels similar to those in which they were selected. Yield gains under very severe stress occurred only in a population derived from a highly tolerant parent. Direct selection usually gave greater response under stress than indirect selection under nonstress conditions. Direct selection under dry‐season stress also gave response under naturally occurring wet‐season stress. These results support the hypothesis that selection for yield under reproductive‐stage drought stress is effective in rice, and that choice of donor is very important in breeding drought‐tolerant rice. |
| format | Journal Article |
| id | CGSpace166514 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1665142025-05-14T10:24:07Z Response to direct selection for grain yield under drought stress in rice Venuprasad, R. Lafitte, H.R. Atlin, G.N. artificial selection drought drought resistance heritability indirect selection selection responses water stress philippines Drought is a major cause of yield loss in rain‐fed rice (Oryza sativa L.), grown on over 40 million ha in Asia. The objective of this study was to evaluate the effectiveness of direct selection for yield under drought stress in upland rice in populations derived from crosses between irrigated high‐yielding cultivars and upland‐adapted cultivars. Random F2:4 lines from five populations were screened for grain yield in fully irrigated lowland fields under nonstress conditions and in uplands under severe reproductive‐stage drought stress. Stress caused mean yield reduction of 64% across populations. Broad‐sense heritability for yield was not consistently lower in stress than in nonstress trials. Response to selection was evaluated in two crosses in subsequent seasons. Stress‐selected lines had a yield advantage of 25 to 34% over random lines when evaluated at stress levels similar to those in which they were selected. Yield gains under very severe stress occurred only in a population derived from a highly tolerant parent. Direct selection usually gave greater response under stress than indirect selection under nonstress conditions. Direct selection under dry‐season stress also gave response under naturally occurring wet‐season stress. These results support the hypothesis that selection for yield under reproductive‐stage drought stress is effective in rice, and that choice of donor is very important in breeding drought‐tolerant rice. 2007-01 2024-12-19T12:56:21Z 2024-12-19T12:56:21Z Journal Article https://hdl.handle.net/10568/166514 en Wiley Venuprasad, R.; Lafitte, H. R. and Atlin, G. N. 2007. Response to direct selection for grain yield under drought stress in rice. Crop Science, Volume 47 no. 1 p. 285-293 |
| spellingShingle | artificial selection drought drought resistance heritability indirect selection selection responses water stress philippines Venuprasad, R. Lafitte, H.R. Atlin, G.N. Response to direct selection for grain yield under drought stress in rice |
| title | Response to direct selection for grain yield under drought stress in rice |
| title_full | Response to direct selection for grain yield under drought stress in rice |
| title_fullStr | Response to direct selection for grain yield under drought stress in rice |
| title_full_unstemmed | Response to direct selection for grain yield under drought stress in rice |
| title_short | Response to direct selection for grain yield under drought stress in rice |
| title_sort | response to direct selection for grain yield under drought stress in rice |
| topic | artificial selection drought drought resistance heritability indirect selection selection responses water stress philippines |
| url | https://hdl.handle.net/10568/166514 |
| work_keys_str_mv | AT venuprasadr responsetodirectselectionforgrainyieldunderdroughtstressinrice AT lafittehr responsetodirectselectionforgrainyieldunderdroughtstressinrice AT atlingn responsetodirectselectionforgrainyieldunderdroughtstressinrice |