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Salt tolerance loci and candidate genes identified in barley germination

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Research area:agriculture-foodagronomy-crops

What the study found

The study found 306 significant single nucleotide polymorphisms, or SNPs, which are DNA differences used as genetic markers, associated with salt tolerance traits during barley germination. It also identified 24 candidate genes and found that amino acid biosynthesis and phenylpropanoid biosynthesis were significantly enriched under salt stress.

Why the authors say this matters

The authors conclude that these findings provide genetic resources for improving barley salt tolerance at germination through genomic-assisted selection. The study suggests the results can also support further functional analysis of the candidate genes.

What the researchers tested

The researchers evaluated 250 diverse barley accessions over two consecutive years under 200 mM NaCl salt stress. They measured five morphological traits at the germination stage and then used genome-wide association study, or GWAS, along with transcriptomic and metabolomic analyses.

What worked and what didn't

Salt treatment significantly inhibited all measured traits, including relative germination rate, shoot length, root length, shoot fresh weight, and root fresh weight. The GWAS identified 306 significant SNPs, and the integrated analyses detected 324 differentially accumulated metabolites and 2351 differentially expressed genes, with many linked to amino acid biosynthesis and phenylpropanoid biosynthesis. An integrative analysis of GWAS and transcriptome data identified 24 candidate genes, including genes associated with antioxidant enzymes, membrane protein transport, transcription factors, and receptor proteins.

What to keep in mind

The abstract does not describe validation experiments for the candidate genes. It also does not provide details about effect sizes, causal relationships, or how the findings perform beyond the tested germination-stage salt stress conditions.

Key points

  • Salt stress reduced all five germination-stage traits measured in barley.
  • GWAS identified 306 significant SNPs linked to salt tolerance traits.
  • Multi-omics analysis found 324 differentially accumulated metabolites and 2351 differentially expressed genes.
  • Amino acid biosynthesis and phenylpropanoid biosynthesis were significantly enriched under salt stress.
  • Twenty-four candidate genes were identified, including genes related to antioxidant enzymes, transport, transcription factors, and receptor proteins.

Disclosure

Research title:
Salt tolerance loci and candidate genes identified in barley germination
Authors:
Haiye Luan, Saijia Wu, Yuhao Wu, Menglin Sun, Tianjing Zhou, Fangfang Liu, Meng Xu, Xiao Xu, gongneng feng, yinghu zhang, Jincheng Xing, Huiquan Shen
Institutions:
Yancheng Institute of Technology, Yancheng Teachers University, Yancheng Teachers University, Yancheng Teachers University, Yancheng Teachers University, Yancheng Teachers University, Yancheng Teachers University, Yancheng Teachers University
Publication date:
2026-02-25
DOI:
10.1016/j.stress.2026.101318
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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