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Title: Genome-Wide Identification of Splicing Quantitative Trait Loci (sQTLs) in Diverse Ecotypes of Arabidopsis thaliana

Abstract

Alternative splicing (AS) of pre-mRNAs contributes to transcriptome diversity and enables plants to generate different protein isoforms from a single gene and/or fine-tune gene expression during different development stages and environmental changes. Although AS is pervasive, the genetic basis for differential isoform usage in plants is still emerging. In this study, we performed genome-wide analysis in 666 geographically distributed diverse ecotypes of Arabidopsis thaliana to identify genomic regions [splicing quantitative trait loci (sQTLs)] that may regulate differential AS. These ecotypes belong to different microclimatic conditions and are part of the relict and non-relict populations. Although sQTLs were spread across the genome, we observed enrichment for trans-sQTL (trans-sQTLs hotspots) on chromosome one. Furthermore, we identified several sQTL (911) that co-localized with trait-linked single nucleotide polymorphisms (SNP) identified in the Arabidopsis genome-wide association studies (AraGWAS). Many sQTLs were enriched among circadian clock, flowering, and stress-responsive genes, suggesting a role for differential isoform usage in regulating these important processes in diverse ecotypes of Arabidopsis. In conclusion, the current study provides a deep insight into SNPs affecting isoform ratios/genes and facilitates a better mechanistic understanding of trait-associated SNPs in GWAS studies. To the best of our knowledge, this is the first report of sQTLmore » analysis in a large set of Arabidopsis ecotypes and can be used as a reference to perform sQTL analysis in the Brassicaceae family. Since whole genome and transcriptome datasets are available for these diverse ecotypes, it could serve as a powerful resource for the biological interpretation of trait-associated loci, splice isoform ratios, and their phenotypic consequences to help produce more resilient and high yield crop varieties.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [4];  [4]
  1. Canterbury Christ Church University, Canterbury, (United Kingdom). School of Human and Life Sciences
  2. The Roslin Institute, University of Edinburgh, Edinburgh, (United Kingdom). Division of Infection and Immunity; Univ. of Edinburgh, Edinburgh (United Kingdom). Centre for Tropical Livestock Genetics and Health
  3. Colorado State Univ., Fort Collins, CO (United States). Dept. of Biology and Program in Cell and Molecular Biology
  4. Canterbury Christ Church University, Canterbury, (United Kingdom). School of Human and Life Sciences
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1628297
Grant/Contract Number:  
SC0010733
Resource Type:
Accepted Manuscript
Journal Name:
Frontiers in Plant Science
Additional Journal Information:
Journal Volume: 10; Journal ID: ISSN 1664-462X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
Plant Sciences; splicing quantitative trait loci (sQTL); Arabidopsis thaliana; alternative splicing; isoform usage; GWAS; adaptation

Citation Formats

Khokhar, Waqas, Hassan, Musa A., Reddy, Anireddy S. N., Chaudhary, Saurabh, Jabre, Ibtissam, Byrne, Lee J., and Syed, Naeem H. Genome-Wide Identification of Splicing Quantitative Trait Loci (sQTLs) in Diverse Ecotypes of Arabidopsis thaliana. United States: N. p., 2019. Web. doi:10.3389/fpls.2019.01160.
Khokhar, Waqas, Hassan, Musa A., Reddy, Anireddy S. N., Chaudhary, Saurabh, Jabre, Ibtissam, Byrne, Lee J., & Syed, Naeem H. Genome-Wide Identification of Splicing Quantitative Trait Loci (sQTLs) in Diverse Ecotypes of Arabidopsis thaliana. United States. https://doi.org/10.3389/fpls.2019.01160
Khokhar, Waqas, Hassan, Musa A., Reddy, Anireddy S. N., Chaudhary, Saurabh, Jabre, Ibtissam, Byrne, Lee J., and Syed, Naeem H. Thu . "Genome-Wide Identification of Splicing Quantitative Trait Loci (sQTLs) in Diverse Ecotypes of Arabidopsis thaliana". United States. https://doi.org/10.3389/fpls.2019.01160. https://www.osti.gov/servlets/purl/1628297.
@article{osti_1628297,
title = {Genome-Wide Identification of Splicing Quantitative Trait Loci (sQTLs) in Diverse Ecotypes of Arabidopsis thaliana},
author = {Khokhar, Waqas and Hassan, Musa A. and Reddy, Anireddy S. N. and Chaudhary, Saurabh and Jabre, Ibtissam and Byrne, Lee J. and Syed, Naeem H.},
abstractNote = {Alternative splicing (AS) of pre-mRNAs contributes to transcriptome diversity and enables plants to generate different protein isoforms from a single gene and/or fine-tune gene expression during different development stages and environmental changes. Although AS is pervasive, the genetic basis for differential isoform usage in plants is still emerging. In this study, we performed genome-wide analysis in 666 geographically distributed diverse ecotypes of Arabidopsis thaliana to identify genomic regions [splicing quantitative trait loci (sQTLs)] that may regulate differential AS. These ecotypes belong to different microclimatic conditions and are part of the relict and non-relict populations. Although sQTLs were spread across the genome, we observed enrichment for trans-sQTL (trans-sQTLs hotspots) on chromosome one. Furthermore, we identified several sQTL (911) that co-localized with trait-linked single nucleotide polymorphisms (SNP) identified in the Arabidopsis genome-wide association studies (AraGWAS). Many sQTLs were enriched among circadian clock, flowering, and stress-responsive genes, suggesting a role for differential isoform usage in regulating these important processes in diverse ecotypes of Arabidopsis. In conclusion, the current study provides a deep insight into SNPs affecting isoform ratios/genes and facilitates a better mechanistic understanding of trait-associated SNPs in GWAS studies. To the best of our knowledge, this is the first report of sQTL analysis in a large set of Arabidopsis ecotypes and can be used as a reference to perform sQTL analysis in the Brassicaceae family. Since whole genome and transcriptome datasets are available for these diverse ecotypes, it could serve as a powerful resource for the biological interpretation of trait-associated loci, splice isoform ratios, and their phenotypic consequences to help produce more resilient and high yield crop varieties.},
doi = {10.3389/fpls.2019.01160},
journal = {Frontiers in Plant Science},
number = ,
volume = 10,
place = {United States},
year = {Thu Oct 03 00:00:00 EDT 2019},
month = {Thu Oct 03 00:00:00 EDT 2019}
}

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SKIP Confers Osmotic Tolerance during Salt Stress by Controlling Alternative Gene Splicing in Arabidopsis
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Perspective on Alternative Splicing and Proteome Complexity in Plants
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Shedding light on the circadian clock and the photoperiodic control of flowering
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CONSTANS mediates between the circadian clock and the control of flowering in Arabidopsis
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Altered circadian rhythms regulate growth vigour in hybrids and allopolyploids
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Multiple reference genomes and transcriptomes for Arabidopsis thaliana
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Identification of genetic variants associated with alternative splicing using sQTLseekeR
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An oomycete plant pathogen reprograms host pre-mRNA splicing to subvert immunity
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Diurnal down-regulation of ethylene biosynthesis mediates biomass heterosis
journal, May 2018

  • Song, Qingxin; Ando, Atsumi; Xu, Dongqing
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Genetics of alternative splicing evolution during sunflower domestication
journal, June 2018

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From retrograde signaling to flowering time
journal, June 2015


Environmental Stresses Modulate Abundance and Timing of Alternatively Spliced Circadian Transcripts in Arabidopsis
journal, November 2014

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Evolutionary conservation and regulation of particular alternative splicing events in plant SR proteins
journal, August 2006

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  • Nucleic Acids Research, Vol. 34, Issue 16
  • DOI: 10.1093/nar/gkl570

Alternative splicing and nonsense-mediated decay modulate expression of important regulatory genes in Arabidopsis
journal, November 2011

  • Kalyna, Maria; Simpson, Craig G.; Syed, Naeem H.
  • Nucleic Acids Research, Vol. 40, Issue 6
  • DOI: 10.1093/nar/gkr932

PlantDHS: a database for DNase I hypersensitive sites in plants
journal, September 2015

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PlantTFDB 4.0: toward a central hub for transcription factors and regulatory interactions in plants
journal, October 2016

  • Jin, Jinpu; Tian, Feng; Yang, De-Chang
  • Nucleic Acids Research, Vol. 45, Issue D1
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Does co-transcriptional regulation of alternative splicing mediate plant stress responses?
journal, February 2019

  • Jabre, Ibtissam; Reddy, Anireddy S. N.; Kalyna, Maria
  • Nucleic Acids Research, Vol. 47, Issue 6
  • DOI: 10.1093/nar/gkz121

Variation in the epigenetic silencing of FLC contributes to natural variation in Arabidopsis vernalization response
journal, November 2006

  • Shindo, C.; Lister, C.; Crevillen, P.
  • Genes & Development, Vol. 20, Issue 22
  • DOI: 10.1101/gad.405306

Genetic architecture of regulatory variation in Arabidopsis thaliana
journal, April 2011


An Autoregulatory Loop Controlling Arabidopsis HsfA2 Expression: Role of Heat Shock-Induced Alternative Splicing
journal, March 2013


Integrating Omics and Alternative Splicing Reveals Insights into Grape Response to High Temperature
journal, January 2017

  • Jiang, Jianfu; Liu, Xinna; Liu, Chonghuai
  • Plant Physiology, Vol. 173, Issue 2
  • DOI: 10.1104/pp.16.01305

A SIMPLE Pipeline for Mapping Point Mutations
journal, May 2017

  • Wachsman, Guy; Modliszewski, Jennifer L.; Valdes, Manuel
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Works referencing / citing this record:

Identification of eQTLs and sQTLs associated with meat quality in beef
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Identification of eQTLs and sQTLs associated with meat quality in beef
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