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<p>The purple appearance of hypocotyl-tuber in turnip is attributed to the anthocyanin content. In this research, we identified the genetic basis underlying anthocyanin accumulation and purple epidermis formation. Genetic analysis revealed that a dominant gene, designated as <i>Pur1</i>, on the short arm of chromosome A05, played a major role in the formation of the purple epidermis phenotype. We mapped the <i>Pur1</i> gene within a 43.38 kbp genomic interval, which contained ten annotated genes according to the ECD04 reference genome. Two genes, <i>BraA05g014086E</i> and <i>BraA05g014093E</i>, which encode an ABA-inducible bHLH-type transcription factor and a WRKY transcription factor, respectively, are identified as the candidate genes. In summary, these findings lay the genetic basis for understanding the purple epidermis trait in turnip hypocotyl-tuber.</p>

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Characterization and fine mapping of Pur1 locus regulating anthocyanin accumulation in turnip (Brassica rapa ssp. rapa)

  • 期刊论文

  • 发表日期：

    2025年12月18日

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  • Deju Shui,
  • Yancai Wang,
  • Jiangyan Wang,
  • Yingqiang Li,
  • Ji Sun,
  • Shuhao Li,
  • Shengmei Zhang,
  • Xibo Feng,
  • Huanwen Xu

摘要

The purple appearance of hypocotyl-tuber in turnip is attributed to the anthocyanin content. In this research, we identified the genetic basis underlying anthocyanin accumulation and purple epidermis formation. Genetic analysis revealed that a dominant gene, designated as Pur1, on the short arm of chromosome A05, played a major role in the formation of the purple epidermis phenotype. We mapped the Pur1 gene within a 43.38 kbp genomic interval, which contained ten annotated genes according to the ECD04 reference genome. Two genes, BraA05g014086E and BraA05g014093E, which encode an ABA-inducible bHLH-type transcription factor and a WRKY transcription factor, respectively, are identified as the candidate genes. In summary, these findings lay the genetic basis for understanding the purple epidermis trait in turnip hypocotyl-tuber.