Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions
The objective of this study was to determine drought tolerance characteristics of dryland wheat genotypes based on leaf gas exchange and water-use efficiency in order to identify promising genotypes for drought tolerance breeding. Physiological responses of ten genetically diverse wheat genotypes we...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-11-01
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| Series: | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09064710.2018.1480729 |
| _version_ | 1797684418020638720 |
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| author | Nkhathutsheleni Maureen Tshikunde Alfred Odindo Hussein Shimelis Jacob Mashilo |
| author_facet | Nkhathutsheleni Maureen Tshikunde Alfred Odindo Hussein Shimelis Jacob Mashilo |
| author_sort | Nkhathutsheleni Maureen Tshikunde |
| collection | DOAJ |
| description | The objective of this study was to determine drought tolerance characteristics of dryland wheat genotypes based on leaf gas exchange and water-use efficiency in order to identify promising genotypes for drought tolerance breeding. Physiological responses of ten genetically diverse wheat genotypes were studied under non-stressed (NS) and water stressed (WS) conditions using a 2 × 10 factorial experiment replicated 3 times. A highly significant water condition × genotype interaction (P < 0.001) was observed for photosynthetic rate (A), ratio of photosynthetic rate and internal CO2 concentration (A/Ci), ratio of internal and atmospheric CO2 (Ci/Ca), intrinsic (WUEi) and instantaneous (WUEinst) water-use efficiencies suggesting genotypic variability among wheat genotypes under both test conditions. Principal component analysis (PCA) identified three principal components (PC’s) under both test conditions accounting for 84% and 89% of total variation, respectively. Bi-plot analysis identified G339 and G344 as drought tolerant genotypes with higher values of A, T, gs, A/Ci, WUEi and WUEinst under WS condition. The current study detected significant genetic variation for drought tolerance among the tested wheat genotypes using physiological parameters. Genotypes G339 and G344 were identified to be drought tolerant with efficient A, T, gs, A/Ci and water-use under water stressed condition. |
| first_indexed | 2024-03-12T00:29:22Z |
| format | Article |
| id | doaj.art-936af7a0adcd43b489d7bf5a89079799 |
| institution | Directory Open Access Journal |
| issn | 0906-4710 1651-1913 |
| language | English |
| last_indexed | 2024-03-12T00:29:22Z |
| publishDate | 2018-11-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| spelling | doaj.art-936af7a0adcd43b489d7bf5a890797992023-09-15T10:26:24ZengTaylor & Francis GroupActa Agriculturae Scandinavica. Section B, Soil and Plant Science0906-47101651-19132018-11-0168873874810.1080/09064710.2018.14807291480729Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditionsNkhathutsheleni Maureen Tshikunde0Alfred Odindo1Hussein Shimelis2Jacob Mashilo3University of KwaZulu-NatalUniversity of KwaZulu-NatalUniversity of KwaZulu-NatalUniversity of KwaZulu-NatalThe objective of this study was to determine drought tolerance characteristics of dryland wheat genotypes based on leaf gas exchange and water-use efficiency in order to identify promising genotypes for drought tolerance breeding. Physiological responses of ten genetically diverse wheat genotypes were studied under non-stressed (NS) and water stressed (WS) conditions using a 2 × 10 factorial experiment replicated 3 times. A highly significant water condition × genotype interaction (P < 0.001) was observed for photosynthetic rate (A), ratio of photosynthetic rate and internal CO2 concentration (A/Ci), ratio of internal and atmospheric CO2 (Ci/Ca), intrinsic (WUEi) and instantaneous (WUEinst) water-use efficiencies suggesting genotypic variability among wheat genotypes under both test conditions. Principal component analysis (PCA) identified three principal components (PC’s) under both test conditions accounting for 84% and 89% of total variation, respectively. Bi-plot analysis identified G339 and G344 as drought tolerant genotypes with higher values of A, T, gs, A/Ci, WUEi and WUEinst under WS condition. The current study detected significant genetic variation for drought tolerance among the tested wheat genotypes using physiological parameters. Genotypes G339 and G344 were identified to be drought tolerant with efficient A, T, gs, A/Ci and water-use under water stressed condition.http://dx.doi.org/10.1080/09064710.2018.1480729breedingdrought stressdrought tolerancewater-use efficiencywheat |
| spellingShingle | Nkhathutsheleni Maureen Tshikunde Alfred Odindo Hussein Shimelis Jacob Mashilo Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions Acta Agriculturae Scandinavica. Section B, Soil and Plant Science breeding drought stress drought tolerance water-use efficiency wheat |
| title | Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions |
| title_full | Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions |
| title_fullStr | Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions |
| title_full_unstemmed | Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions |
| title_short | Leaf gas exchange and water-use efficiency of dry-land wheat genotypes under water stressed and non-stressed conditions |
| title_sort | leaf gas exchange and water use efficiency of dry land wheat genotypes under water stressed and non stressed conditions |
| topic | breeding drought stress drought tolerance water-use efficiency wheat |
| url | http://dx.doi.org/10.1080/09064710.2018.1480729 |
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