Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes?
Selection for early vigour can improve rice (Oryza sativa L.) seedlings’ access to resources, weed competitiveness and yield. Little is known about the relationships between early vigour and drought tolerance. This study explored a panel of 176 rice genotypes in a controlled environment regarding a...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Commonwealth Scientific and Industrial Research Organisation
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/51509 |
| _version_ | 1855515385120423936 |
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| author | Rebolledo, María Camila Luquet, D Courtois, Brigitte Henry, A Soulie, JC Rouan, L Dingkuhn, Michael |
| author_browse | Courtois, Brigitte Dingkuhn, Michael Henry, A Luquet, D Rebolledo, María Camila Rouan, L Soulie, JC |
| author_facet | Rebolledo, María Camila Luquet, D Courtois, Brigitte Henry, A Soulie, JC Rouan, L Dingkuhn, Michael |
| author_sort | Rebolledo, María Camila |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Selection for early vigour can improve rice (Oryza sativa L.) seedlings’ access to resources, weed competitiveness and yield. Little is known about the relationships between early vigour and drought tolerance. This study explored a panel of 176 rice genotypes in a controlled environment regarding a diversity of traits and trait combinations related to early vigour and water use under drought. The design excluded genotypic differences for root depth. We hypothesised that early vigour (as determined by biomass accumulation under well-watered conditions) was not independent from drought tolerance (determined by biomass accumulation maintenance under drought). Leaf size, developmental rate (DR) and tiller number contributed positively to shoot DW and leaf area, and thus vigour. Early vigour was negatively correlated with growth maintenance and water use efficiency under drought, suggesting tradeoffs. Three clusters of genotypes were identified based on the constitutive traits DR, specific leaf area, tiller number and leaf size. The less drought-tolerant cluster, mainly with lowland O. sativa indica rices, showed a sensitive transpiration response to the fraction of transpirable soil water; however, under well-watered conditions these genotypes were vigorous, with small leaves, high DR and high tillering. This experiment showed that the tradeoff between early vigour and drought tolerance was physiological and not a matter of access to water. The results are discussed with a view to identify drought adaptation strategies for crop improvement. Further improvement of multitrait phenotyping approaches is proposed. |
| format | Journal Article |
| id | CGSpace51509 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Commonwealth Scientific and Industrial Research Organisation |
| publisherStr | Commonwealth Scientific and Industrial Research Organisation |
| record_format | dspace |
| spelling | CGSpace515092025-12-17T08:03:25Z Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? Rebolledo, María Camila Luquet, D Courtois, Brigitte Henry, A Soulie, JC Rouan, L Dingkuhn, Michael oryza sativa genotypes drought tolerance water use efficiency genotipos tolerancia a la sequía eficacia en el uso del agua Selection for early vigour can improve rice (Oryza sativa L.) seedlings’ access to resources, weed competitiveness and yield. Little is known about the relationships between early vigour and drought tolerance. This study explored a panel of 176 rice genotypes in a controlled environment regarding a diversity of traits and trait combinations related to early vigour and water use under drought. The design excluded genotypic differences for root depth. We hypothesised that early vigour (as determined by biomass accumulation under well-watered conditions) was not independent from drought tolerance (determined by biomass accumulation maintenance under drought). Leaf size, developmental rate (DR) and tiller number contributed positively to shoot DW and leaf area, and thus vigour. Early vigour was negatively correlated with growth maintenance and water use efficiency under drought, suggesting tradeoffs. Three clusters of genotypes were identified based on the constitutive traits DR, specific leaf area, tiller number and leaf size. The less drought-tolerant cluster, mainly with lowland O. sativa indica rices, showed a sensitive transpiration response to the fraction of transpirable soil water; however, under well-watered conditions these genotypes were vigorous, with small leaves, high DR and high tillering. This experiment showed that the tradeoff between early vigour and drought tolerance was physiological and not a matter of access to water. The results are discussed with a view to identify drought adaptation strategies for crop improvement. Further improvement of multitrait phenotyping approaches is proposed. 2013 2014-11-12T13:42:25Z 2014-11-12T13:42:25Z Journal Article https://hdl.handle.net/10568/51509 en Limited Access Commonwealth Scientific and Industrial Research Organisation Rebolledo, Maria Camila; Luquet, Delphine; Courtois, Brigitte; Henry, Amelia; Soulié, Jean-Christophe; Rouan, Lauriane; Dingkuhn, Michael. 2013. Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? Functional Plant Biology. 40 (6): 582-594. |
| spellingShingle | oryza sativa genotypes drought tolerance water use efficiency genotipos tolerancia a la sequía eficacia en el uso del agua Rebolledo, María Camila Luquet, D Courtois, Brigitte Henry, A Soulie, JC Rouan, L Dingkuhn, Michael Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? |
| title | Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? |
| title_full | Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? |
| title_fullStr | Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? |
| title_full_unstemmed | Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? |
| title_short | Can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes? |
| title_sort | can early vigour occur in combination with drought tolerance and efficient water use in rice genotypes |
| topic | oryza sativa genotypes drought tolerance water use efficiency genotipos tolerancia a la sequía eficacia en el uso del agua |
| url | https://hdl.handle.net/10568/51509 |
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