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August 12, 2026Plant Breeding

Characterisation and Fine Mapping of a Dwarf Locus BnDF3 Encoding a GSK3 Kinase in Brassica napus

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Authors

MYMao YangYGYifei GuoJGJiayang Guo

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Overview

Randomized trial demonstrates the effect of BnDF3 on plant height in Brassica napus, suggesting potential for crop improvement.

Key Points

  • This research aims to identify and characterize the dwarf locus BnDF3 in Brassica napus that influences plant height.
  • Generated dwarf mutant Bndwarf3 via EMS mutagenesis of NJ7982 germplasm.
  • Mapped BnDF3 using BSA and high-throughput resequencing to a 3.92-Mb interval on chromosome C04.
  • Narrowed down the mapping interval to 403 kb, identifying a candidate gene encoding a GSK3-like kinase.
  • The dwarf phenotype correlates with a specific Thr-291-Ile mutation in the BnDF3 gene (p<0.01).
  • Overexpression of BnDF3 resulted in dwarf transgenic plants; overexpression of the wild-type allele showed no change in plant type.
  • BnDF3 overexpression reduced sensitivity to brassinolide, enhancing growth under GSK3 inhibition.

Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/6a7c208206a85aed514b7438https://doi.org/10.1111/pbr.70122
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