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<p>Ambiguity about whether the histidine-rich calcium-binding protein-coding gene (<i>His</i><sup><i>R</i></sup>) or the pore-forming toxin-like gene (<i>PFT</i>) or both are responsible for Fusarium head blight (FHB) resistance conferred by the <i>Fhb1</i> quantitative trait locus hinders progress toward elucidating <i>Fhb1</i> resistance mechanisms. Here, with a series of developed lines with or without <i>PFT</i> but all possessing <i>His</i><sup><i>R</i></sup> and five <i>His</i><sup><i>R</i></sup>-carrying <i>PFT</i> mutant lines created via gene editing, we show that <i>PFT</i> does not confer FHB resistance and that the <i>His</i><sup><i>R</i></sup> resistance effect does not require <i>PFT</i> in the tested conditions. We also show that <i>PFT</i> mutations are not associated with morphological and phenological characteristics that often affect FHB severity.</p>

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Mutagenesis and analysis of contrasting wheat lines do not support a role for PFT in Fusarium head blight resistance

  • 期刊论文

  • 发表日期：

    2025年1月14日

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  • Jinxing Shi,
  • Zhongxin Kong,
  • Jinkun Zhong,
  • Xiaoqiu Zhang,
  • Xianmin Luo,
  • Heyu Wang,
  • Boyang Xu,
  • Xin Wang,
  • Rui Cheng,
  • Yang Yuan,
  • Na Li,
  • Quan Xie,
  • Guoqiang Li,
  • Haiyan Jia,
  • Zhengqiang Ma

摘要

Ambiguity about whether the histidine-rich calcium-binding protein-coding gene (HisR) or the pore-forming toxin-like gene (PFT) or both are responsible for Fusarium head blight (FHB) resistance conferred by the Fhb1 quantitative trait locus hinders progress toward elucidating Fhb1 resistance mechanisms. Here, with a series of developed lines with or without PFT but all possessing HisR and five HisR-carrying PFT mutant lines created via gene editing, we show that PFT does not confer FHB resistance and that the HisR resistance effect does not require PFT in the tested conditions. We also show that PFT mutations are not associated with morphological and phenological characteristics that often affect FHB severity.