Cargando…
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...
Autores principales: | , , , |
---|---|
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 |
_version_ | 1783378618940915712 |
---|---|
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. |
format | Online Article Text |
id | pubmed-6280221 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT kamalnasreinmohamed staygreenqtlsresponseinadaptationtopostfloweringdroughtdependsonthedroughtseverity AT gorafiyasirseragalnor staygreenqtlsresponseinadaptationtopostfloweringdroughtdependsonthedroughtseverity AT tsujimotohisashi staygreenqtlsresponseinadaptationtopostfloweringdroughtdependsonthedroughtseverity AT ghanimabdelbagimukhtarali staygreenqtlsresponseinadaptationtopostfloweringdroughtdependsonthedroughtseverity |