Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity
Joint Authors
Kamal, Nasrein Mohamed
Gorafi, Yasir Serag Alnor
Tsujimoto, Hisashi
Ghanim, Abdelbagi Mukhtar Ali
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-11-18
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
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 (W100: 100% of soil field capacity (FC)) and two levels of post-flowering drought (W75: 75% FC; W50: 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.
W50 caused the highest reduction in BILs performance.
From W100 to W50, the GY of the recurrent parent reduced by 70%, whereas that of the BILs reduced by only 36%.
W75 and W50 induce different behavior/response compared to W100.
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 W75, whereas it was important at mid-grain filling and late-grain filling at W50.
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.
American Psychological Association (APA)
Kamal, Nasrein Mohamed& Gorafi, Yasir Serag Alnor& Tsujimoto, Hisashi& Ghanim, Abdelbagi Mukhtar Ali. 2018. Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity. BioMed Research International،Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1128250
Modern Language Association (MLA)
Kamal, Nasrein Mohamed…[et al.]. Stay-Green QTLs Response in Adaptation to Post-Flowering Drought Depends on the Drought Severity. BioMed Research International No. 2018 (2018), pp.1-15.
https://search.emarefa.net/detail/BIM-1128250
American Medical Association (AMA)
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. BioMed Research International. 2018. Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1128250
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1128250