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

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dc.creatorElakhdar, Ammar
dc.creatorJ. Slask, Jan
dc.creatorKubo, Takahiko
dc.creatorHamwieh, Aladdin
dc.creatorHernandez Ramirez, Guillermo
dc.creatorD. Beattie, Aaron
dc.creatorChichi, Ludovic J.A. Capo
dc.date2023-06-03
dc.date2023-11-02T13:26:46Z
dc.date2023-11-02T13:26:46Z
dc.date.accessioned2026-06-27T14:24:34Z
dc.descriptionLow-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.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/132670
dc.identifier.urihttp://hdl.handle.net/123456789/78853
dc.languageen
dc.publisherFrontiers Media
dc.rightsOpen Access
dc.sourceAmmar 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.
dc.subjectchlorophyll fluorescence
dc.subjectprotein kinase
dc.subjectbarley
dc.subjectspring barley
dc.subjecthordeum vulgare l.
dc.subjectphotosystem ii photochemistry
dc.subjectquantitative trait nucleotides (qtns)
dc.subjectmixed linear model (mlm)
dc.subjectabscisic acid (aba) signaling
dc.subjectpost-transcription modification
dc.titleGenome-wide association analysis provides insights into the genetic basis of photosynthetic responses to low-temperature stress in spring barley
dc.typeJournal Article

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Centro Internacional para la Investigación Agrícola en las Áreas Secas (ICARDA)