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Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes
Increasing photosynthesis in wheat has been identified as an approach to enhance crop yield, with manipulation of key genes involved in electron transport and the Calvin cycle as one avenue currently being explored. However, natural variation in photosynthetic capacity is a currently unexploited gen...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4144772/ https://www.ncbi.nlm.nih.gov/pubmed/24963002 http://dx.doi.org/10.1093/jxb/eru253 |
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author | Driever, S. M. Lawson, T. Andralojc, P. J. Raines, C. A. Parry, M. A. J. |
author_facet | Driever, S. M. Lawson, T. Andralojc, P. J. Raines, C. A. Parry, M. A. J. |
author_sort | Driever, S. M. |
collection | PubMed |
description | Increasing photosynthesis in wheat has been identified as an approach to enhance crop yield, with manipulation of key genes involved in electron transport and the Calvin cycle as one avenue currently being explored. However, natural variation in photosynthetic capacity is a currently unexploited genetic resource for potential crop improvement. Using gas-exchange analysis and protein analysis, the existing natural variation in photosynthetic capacity in a diverse panel of 64 elite wheat cultivars grown in the field was examined relative to growth traits, including biomass and harvest index. Significant variations in photosynthetic capacity, biomass, and yield were observed, although no consistent correlation was found between photosynthetic capacity of the flag leaf and grain yield when all cultivars were compared. The majority of the variation in photosynthesis could be explained by components related to maximum capacity and operational rates of CO(2) assimilation, and to CO(2) diffusion. Cluster analysis revealed that cultivars may have been bred unintentionally for desirable traits at the expense of photosynthetic capacity. These findings suggest that there is significant underutilized photosynthetic capacity among existing wheat varieties. Our observations are discussed in the context of exploiting existing natural variation in physiological processes for the improvement of photosynthesis in wheat. |
format | Online Article Text |
id | pubmed-4144772 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-41447722014-08-27 Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes Driever, S. M. Lawson, T. Andralojc, P. J. Raines, C. A. Parry, M. A. J. J Exp Bot Research Paper Increasing photosynthesis in wheat has been identified as an approach to enhance crop yield, with manipulation of key genes involved in electron transport and the Calvin cycle as one avenue currently being explored. However, natural variation in photosynthetic capacity is a currently unexploited genetic resource for potential crop improvement. Using gas-exchange analysis and protein analysis, the existing natural variation in photosynthetic capacity in a diverse panel of 64 elite wheat cultivars grown in the field was examined relative to growth traits, including biomass and harvest index. Significant variations in photosynthetic capacity, biomass, and yield were observed, although no consistent correlation was found between photosynthetic capacity of the flag leaf and grain yield when all cultivars were compared. The majority of the variation in photosynthesis could be explained by components related to maximum capacity and operational rates of CO(2) assimilation, and to CO(2) diffusion. Cluster analysis revealed that cultivars may have been bred unintentionally for desirable traits at the expense of photosynthetic capacity. These findings suggest that there is significant underutilized photosynthetic capacity among existing wheat varieties. Our observations are discussed in the context of exploiting existing natural variation in physiological processes for the improvement of photosynthesis in wheat. Oxford University Press 2014-09 2014-06-24 /pmc/articles/PMC4144772/ /pubmed/24963002 http://dx.doi.org/10.1093/jxb/eru253 Text en © The Author 2014. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Paper Driever, S. M. Lawson, T. Andralojc, P. J. Raines, C. A. Parry, M. A. J. Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
title | Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
title_full | Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
title_fullStr | Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
title_full_unstemmed | Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
title_short | Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
title_sort | natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes |
topic | Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4144772/ https://www.ncbi.nlm.nih.gov/pubmed/24963002 http://dx.doi.org/10.1093/jxb/eru253 |
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