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Genome-wide association analysis provides insights into the genetic basis of photosynthetic responses to low-temperature stress in spring barley

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Title Genome-wide association analysis provides insights into the genetic basis of photosynthetic responses to low-temperature stress in spring barley
 
Creator Elakhdar, Ammar
 
Contributor J. Slask, Jan
Kubo, Takahiko
Hamwieh, Aladdin
Hernandez Ramirez, Guillermo
D. Beattie, Aaron
Chichi, Ludovic J.A. Capo
 
Subject hordeum vulgare l.
photosystem ii photochemistry
quantitative trait nucleotides (qtns)
mixed linear model (mlm)
abscisic acid (aba) signaling
post-transcription modification
 
Description Low-temperature stress (LTS) is among the major abiotic stresses affecting the geographical distribution and productivity of the most important crops. Understanding the genetic basis of photosynthetic variation under cold stress is necessary for developing more climate-resilient barley cultivars. To that end, we investigated the ability of chlorophyll fluorescence parameters (FVFM, and FVF0) to respond to changes in the maximum quantum yield of Photosystem II photochemistry as an indicator of photosynthetic energy. A panel of 96 barley spring cultivars from different breeding zones of Canada was evaluated for chlorophyll fluorescence-related traits under cold acclimation and freeze shock stresses at different times. Genome-wide association studies (GWAS) were performed using a mixed linear model (MLM). We identified three major and putative genomic regions harboring 52 significant quantitative trait nucleotides (QTNs) on chromosomes 1H, 3H, and 6H for low-temperature tolerance. Functional annotation indicated several QTNs were either within the known or close to genes that play important roles in the photosynthetic metabolites such as abscisic acid (ABA) signaling, hydrolase activity, protein kinase, and transduction of environmental signal transduction at the posttranslational modification levels. These outcomes revealed that barley plants modified their gene expression profile in response to decreasing temperatures resulting in physiological and biochemical modifications. Cold tolerance could influence a long-term adaption of barley in many parts of the world. Since the degree and frequency of LTS vary considerably among production sites. Hence, these results could shed light on potential approaches for improving barley productivity under low-temperature stress.
 
Date 2023-11-02T13:15:01Z
2023-11-02T13:15:01Z
 
Type Journal Article
 
Identifier https://figshare.com/ndownloader/files/38616278
https://www.frontiersin.org/articles/10.3389/fpls.2023.1159016/full#supplementary-material
https://mel.cgiar.org/reporting/download/hash/0052983a2cad2c52d67c977ab671de7d
Ammar Elakhdar, Jan J. Slask, Takahiko Kubo, Aladdin Hamwieh, Guillermo Hernandez Ramirez, Aaron D. Beattie, Ludovic J. A. Capo Chichi. (3/6/2023). Genome-wide association analysis provides insights into the genetic basis of photosynthetic responses to low-temperature stress in spring barley. Frontiers in Plant Science, 14.
https://hdl.handle.net/20.500.11766/68762
Open access
 
Language en
 
Rights CC-BY-4.0
 
Format PDF
 
Publisher Frontiers Media
 
Source Frontiers in Plant Science;14,(2023)