Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress
Drought stress causes crop yield losses worldwide. Sorghum is a C4 species tolerant to moderate drought stress, and its extensive natural variation for photosynthetic traits under water-limiting conditions can be exploited for developing cultivars with enhanced stress tolerance. The objective of thi...
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| Format: | Artículo |
| Language: | Inglés |
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Oxford Academic Press
2024
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| Online Access: | http://hdl.handle.net/20.500.12123/17803 https://academic.oup.com/jxb/article/73/10/3251/6429304 https://doi.org/10.1093/jxb/erab502 |
| _version_ | 1855486046254399488 |
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| author | Ortiz, Diego Salas Fernandez, María G. |
| author_browse | Ortiz, Diego Salas Fernandez, María G. |
| author_facet | Ortiz, Diego Salas Fernandez, María G. |
| author_sort | Ortiz, Diego |
| collection | INTA Digital |
| description | Drought stress causes crop yield losses worldwide. Sorghum is a C4 species tolerant to moderate drought stress, and its extensive natural variation for photosynthetic traits under water-limiting conditions can be exploited for developing cultivars with enhanced stress tolerance. The objective of this study was to discover genes/genomic regions that control the sorghum photosynthetic capacity under pre-anthesis water-limiting conditions. We performed a genome-wide association study for seven photosynthetic gas exchange and chlorophyll fluorescence traits during three periods of contrasting soil volumetric water content (VWC): control (30% VWC), drought (15% VWC), and recovery (30% VWC). Water stress was imposed with an automated irrigation system that generated a controlled dry-down period for all plants, to perform an unbiased genotypic comparison. A total of 60 genomic regions were associated with natural variation in one or more photosynthetic traits in a particular treatment or with derived variables. We identified 33 promising candidate genes with predicted functions related to stress signaling, oxidative stress protection, hormonal response to stress, and dehydration protection. Our results provide new knowledge about the natural variation and genetic control of sorghum photosynthetic response to drought with the ultimate goal of improving its adaptation and productivity under water stress scenarios. |
| format | Artículo |
| id | INTA17803 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Oxford Academic Press |
| publisherStr | Oxford Academic Press |
| record_format | dspace |
| spelling | INTA178032024-05-20T10:57:50Z Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress Ortiz, Diego Salas Fernandez, María G. Sorgo Sorghum bicolor Control Genético Estrés de Sequia Rendimiento de Cultivos Fluorescencia de Clorofila Sequia Sorghum Genetic Control Drought Stress Crop Yield Chlorophyll Fluorescence Drought Variación Natural Natural Variation Drought stress causes crop yield losses worldwide. Sorghum is a C4 species tolerant to moderate drought stress, and its extensive natural variation for photosynthetic traits under water-limiting conditions can be exploited for developing cultivars with enhanced stress tolerance. The objective of this study was to discover genes/genomic regions that control the sorghum photosynthetic capacity under pre-anthesis water-limiting conditions. We performed a genome-wide association study for seven photosynthetic gas exchange and chlorophyll fluorescence traits during three periods of contrasting soil volumetric water content (VWC): control (30% VWC), drought (15% VWC), and recovery (30% VWC). Water stress was imposed with an automated irrigation system that generated a controlled dry-down period for all plants, to perform an unbiased genotypic comparison. A total of 60 genomic regions were associated with natural variation in one or more photosynthetic traits in a particular treatment or with derived variables. We identified 33 promising candidate genes with predicted functions related to stress signaling, oxidative stress protection, hormonal response to stress, and dehydration protection. Our results provide new knowledge about the natural variation and genetic control of sorghum photosynthetic response to drought with the ultimate goal of improving its adaptation and productivity under water stress scenarios. EEA Manfredi Fil: Ortiz, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina Fil: Salas-Fernandez, María G. Iowa State University. Department of Agronomy; Estados Unidos 2024-05-20T10:44:24Z 2024-05-20T10:44:24Z 2022-05-23 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/17803 https://academic.oup.com/jxb/article/73/10/3251/6429304 1460-2431 (Online) 0022-0957 (Print) https://doi.org/10.1093/jxb/erab502 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Oxford Academic Press Journal of Experimental Botany 73 (10) : 3251-3267. (May 2022) |
| spellingShingle | Sorgo Sorghum bicolor Control Genético Estrés de Sequia Rendimiento de Cultivos Fluorescencia de Clorofila Sequia Sorghum Genetic Control Drought Stress Crop Yield Chlorophyll Fluorescence Drought Variación Natural Natural Variation Ortiz, Diego Salas Fernandez, María G. Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| title | Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| title_full | Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| title_fullStr | Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| title_full_unstemmed | Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| title_short | Dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| title_sort | dissecting the genetic control of natural variation in sorghum photosynthetic response to drought stress |
| topic | Sorgo Sorghum bicolor Control Genético Estrés de Sequia Rendimiento de Cultivos Fluorescencia de Clorofila Sequia Sorghum Genetic Control Drought Stress Crop Yield Chlorophyll Fluorescence Drought Variación Natural Natural Variation |
| url | http://hdl.handle.net/20.500.12123/17803 https://academic.oup.com/jxb/article/73/10/3251/6429304 https://doi.org/10.1093/jxb/erab502 |
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