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July 20, 2026The Plant Cell

The E3 ligase BnNLA1 modulates seed coat color in Brassica napus through ubiquitination of BnC07MYB3a

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Authors

RHRan HuHLHaijiang LiuYTYunshan Tang

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Overview

Randomized trial reveals the role of BnNLA1 in modulating seed coat color in Brassica napus, indicating new breeding strategies.

Key Points

  • This study aims to understand the genetic regulation of seed coat color in Brassica napus.
  • Conducted a genome-wide association study (GWAS) with 393 cultivars of Brassica napus.
  • Identified NITROGEN LIMITATION ADAPTATION1 (BnNLA1) influencing seed coat color.
  • Analyzed the interaction between BnNLA1 and BnC07MYB3a regarding seed coat pigment accumulation.
  • BnNLA1 regulates seed coat color by ubiquitinating BnC07MYB3a, affecting flavonoid accumulation.
  • Knock-out mutants of BnNLA1 show lighter seed coat color with reduced anthocyanins and proanthocyanidins compared to wild-type.
  • Expression of TRANSPARENT TESTA 6 and BANYULS is significantly lower in BnNLA1 KO mutants.

Cite This Study

Hu et al. (2026) studied this question.

synapsesocial.com/papers/6a5dbab88bd453d3397abcb8https://doi.org/10.1093/plcell/koag220
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