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Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity

Stay-green trait enhances sorghum adaptation to post-flowering drought. Six stay-green backcross introgression lines (BILs) carrying one or more stay-green QTLs (Stg1-4) and their parents were characterized under non-stress (W(100): 100% of soil field capacity (FC)) and two levels of post-flowering...

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Autores principales: Kamal, Nasrein Mohamed, Gorafi, Yasir Serag Alnor, Tsujimoto, Hisashi, Ghanim, Abdelbagi Mukhtar Ali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6280221/
https://www.ncbi.nlm.nih.gov/pubmed/30584537
http://dx.doi.org/10.1155/2018/7082095
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author Kamal, Nasrein Mohamed
Gorafi, Yasir Serag Alnor
Tsujimoto, Hisashi
Ghanim, Abdelbagi Mukhtar Ali
author_facet Kamal, Nasrein Mohamed
Gorafi, Yasir Serag Alnor
Tsujimoto, Hisashi
Ghanim, Abdelbagi Mukhtar Ali
author_sort Kamal, Nasrein Mohamed
collection PubMed
description Stay-green trait enhances sorghum adaptation to post-flowering drought. Six stay-green backcross introgression lines (BILs) carrying one or more stay-green QTLs (Stg1-4) and their parents were characterized under non-stress (W(100): 100% of soil field capacity (FC)) and two levels of post-flowering drought (W(75): 75% FC; W(50): 50% FC) in a controlled condition. We aimed to study the response and identify the drought threshold of these QTLs under different levels of post-flowering drought and find traits closely contributing to grain yield (GY) under different drought severity. W(50) caused the highest reduction in BILs performance. From W(100) to W(50), the GY of the recurrent parent reduced by 70%, whereas that of the BILs reduced by only 36%. W(75) and W(50) induce different behavior/response compared to W(100). Harvest index contributed to the GY under the three water regimes. For high GY under drought transpiration rate at the beginning of drought and mid-grain filling was important at W(75), whereas it was important at mid-grain filling and late-grain filling at W(50). Stay-green trait can be scored simply with the relative number of green leaves/plants under both irrigated and stress environments. QTL pyramiding might not always be necessary to stabilize or increase the GY under post-flowering drought. The stay-green QTLs increase GY under drought by manipulating water utilization depending on drought severity.
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spelling pubmed-62802212018-12-24 Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity Kamal, Nasrein Mohamed Gorafi, Yasir Serag Alnor Tsujimoto, Hisashi Ghanim, Abdelbagi Mukhtar Ali Biomed Res Int Research Article Stay-green trait enhances sorghum adaptation to post-flowering drought. Six stay-green backcross introgression lines (BILs) carrying one or more stay-green QTLs (Stg1-4) and their parents were characterized under non-stress (W(100): 100% of soil field capacity (FC)) and two levels of post-flowering drought (W(75): 75% FC; W(50): 50% FC) in a controlled condition. We aimed to study the response and identify the drought threshold of these QTLs under different levels of post-flowering drought and find traits closely contributing to grain yield (GY) under different drought severity. W(50) caused the highest reduction in BILs performance. From W(100) to W(50), the GY of the recurrent parent reduced by 70%, whereas that of the BILs reduced by only 36%. W(75) and W(50) induce different behavior/response compared to W(100). Harvest index contributed to the GY under the three water regimes. For high GY under drought transpiration rate at the beginning of drought and mid-grain filling was important at W(75), whereas it was important at mid-grain filling and late-grain filling at W(50). Stay-green trait can be scored simply with the relative number of green leaves/plants under both irrigated and stress environments. QTL pyramiding might not always be necessary to stabilize or increase the GY under post-flowering drought. The stay-green QTLs increase GY under drought by manipulating water utilization depending on drought severity. Hindawi 2018-11-18 /pmc/articles/PMC6280221/ /pubmed/30584537 http://dx.doi.org/10.1155/2018/7082095 Text en Copyright © 2018 Nasrein Mohamed Kamal et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Kamal, Nasrein Mohamed
Gorafi, Yasir Serag Alnor
Tsujimoto, Hisashi
Ghanim, Abdelbagi Mukhtar Ali
Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
title Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
title_full Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
title_fullStr Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
title_full_unstemmed Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
title_short Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
title_sort stay-green qtls response in adaptation to post-flowering drought depends on the drought severity
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6280221/
https://www.ncbi.nlm.nih.gov/pubmed/30584537
http://dx.doi.org/10.1155/2018/7082095
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