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Background <p>Fusarium crown rot (FCR) caused by species of <i>Fusarium</i> fungus is a global soil-borne disease of wheat. Increasing results indicate frequent controversy between seedling and adult plant resistance to FCR. To understand relationships between FCR resistance and agronomic traits in seedling and adult wheat (<i>Triticum aestivum</i> L.) plants, we developed 193 near-isogenic lines (NILs) and evaluated FCR severity during seedling and adult plant-growth stages. Agronomic traits such as plant height, thousand-kernel weight (TKW), and the composition of vernalization and dwarf genes were analyzed.</p> Results <p>An FCR disease index (DI) for the seedling stage did not correlate with that of the adult. Adult plant DI correlates extremely, significantly, and negatively with plant height and TKW. Adult FCR severity did not correlate with allelic variations of vernalization genes <i>Vrn-A1</i> and <i>Vrn-D1</i>. The dwarfing gene <i>Rht-D1b</i> significantly reduced plant height and increased FCR severity.</p> Conclusions <p>This study shows that the growth and development of wheat can affect its resistance to FCR. The correlation between FCR severity and plant height suggests that it should be feasible to enhance FCR resistance in wheat cultivars through the manipulation of dwarfing genes. Several phenotypically different lines of FCR severity were identified for subsequent gene mining and resistance mechanism analysis.</p>

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Evaluation on Fusarium crown rot resistance and agronomic traits of wheat near-isogenic lines

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月24日

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  • Shuying Yang,
  • Baisong Yang,
  • Dou Wang,
  • Xin Ma,
  • Liwei Xing,
  • Han Wang,
  • Huihui Zhang,
  • Shunv Hao,
  • Wanke Yu,
  • Kaidi Lyu,
  • Xiaoneng Wan,
  • Jia Luo,
  • Zhiyu Fang,
  • Jiayi Shao,
  • Junhai Yuan,
  • Guozhong Sun

摘要

Background

Fusarium crown rot (FCR) caused by species of Fusarium fungus is a global soil-borne disease of wheat. Increasing results indicate frequent controversy between seedling and adult plant resistance to FCR. To understand relationships between FCR resistance and agronomic traits in seedling and adult wheat (Triticum aestivum L.) plants, we developed 193 near-isogenic lines (NILs) and evaluated FCR severity during seedling and adult plant-growth stages. Agronomic traits such as plant height, thousand-kernel weight (TKW), and the composition of vernalization and dwarf genes were analyzed.

Results

An FCR disease index (DI) for the seedling stage did not correlate with that of the adult. Adult plant DI correlates extremely, significantly, and negatively with plant height and TKW. Adult FCR severity did not correlate with allelic variations of vernalization genes Vrn-A1 and Vrn-D1. The dwarfing gene Rht-D1b significantly reduced plant height and increased FCR severity.

Conclusions

This study shows that the growth and development of wheat can affect its resistance to FCR. The correlation between FCR severity and plant height suggests that it should be feasible to enhance FCR resistance in wheat cultivars through the manipulation of dwarfing genes. Several phenotypically different lines of FCR severity were identified for subsequent gene mining and resistance mechanism analysis.