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Key message <p>The findings reveal that BnCLV1 modulates root growth and yield under N-deficient conditions in rapeseed, which may offering a target for breeding varieties with enhanced N use efficiency and improved agricultural sustainability.</p> Abstract <p>Nitrogen (N) deficiency is a major limiting factor for rapeseed root growth and yield. Therefore, genetic improvement of rapeseed with N acquisition and utilisation efficiency is a curial strategy for enhancing rapeseed yield and N fertiliser efficiency. Using genome-wide association study (GWAS) and transcriptome analyses, we found that natural variation of leucine-rich repeat receptor-like kinase gene (<i>BnCLV1</i>) regulates N-responsive root system architecture at the seeding stage and yield at the maturity in the natural rapeseed population. N supply inhibited <i>BnCLV1</i> expression, thereby increasing lateral root number, root surface area, shoot and root biomass, and total root length at the seeding stage. N supply also enhanced yield, pod number and silique length in the maturation stage. GUS assays showed that <i>BnCLV1</i> signals were negatively regulated in response to N deficiency in primary root, lateral root primordia, leaf veins, and floral primordia tissues. Thus, <i>BnCLV1</i> modulates lateral root and floral primordia activity, reducing root growth and yield under N deficiency. Overall, these findings reveal that <i>BnCLV1</i> modulates root growth and yield under N deficiency in rapeseed, providing a target for breeding varieties with enhanced N-use efficiency and improved agricultural sustainability.</p>

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Natural allelic variation in BnCLV1 orchestrates root architectural remodelling and yield performance under nitrogen-limited conditions in Brassica napu

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • Xiaohua Wang,
  • Yi Du,
  • Baixi Cui,
  • Chuanquan Xu,
  • Jie Niu,
  • Xiaohong Wang,
  • Ping Xu

摘要

Key message

The findings reveal that BnCLV1 modulates root growth and yield under N-deficient conditions in rapeseed, which may offering a target for breeding varieties with enhanced N use efficiency and improved agricultural sustainability.

Abstract

Nitrogen (N) deficiency is a major limiting factor for rapeseed root growth and yield. Therefore, genetic improvement of rapeseed with N acquisition and utilisation efficiency is a curial strategy for enhancing rapeseed yield and N fertiliser efficiency. Using genome-wide association study (GWAS) and transcriptome analyses, we found that natural variation of leucine-rich repeat receptor-like kinase gene (BnCLV1) regulates N-responsive root system architecture at the seeding stage and yield at the maturity in the natural rapeseed population. N supply inhibited BnCLV1 expression, thereby increasing lateral root number, root surface area, shoot and root biomass, and total root length at the seeding stage. N supply also enhanced yield, pod number and silique length in the maturation stage. GUS assays showed that BnCLV1 signals were negatively regulated in response to N deficiency in primary root, lateral root primordia, leaf veins, and floral primordia tissues. Thus, BnCLV1 modulates lateral root and floral primordia activity, reducing root growth and yield under N deficiency. Overall, these findings reveal that BnCLV1 modulates root growth and yield under N deficiency in rapeseed, providing a target for breeding varieties with enhanced N-use efficiency and improved agricultural sustainability.