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Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...

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Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens
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Evaluation of Bna.SCT and Bna.REF1 as Target Genes to Reduce Sinapine in Rapeseed Using a Protoplast-Based CRISPR RNP

Oliver Moss1, Xueyuan Li1, Selvaraju Kanagarajan1

  • 1Department of Plant Breeding, Swedish University of Agricultural Sciences, Lomma, Sweden.

Physiologia Plantarum
|May 8, 2026
PubMed
Summary
This summary is machine-generated.

Gene editing successfully reduced antinutritional sinapine in rapeseed, enhancing its seed meal for animal feed. The Bna.REF1 gene proved most effective for sinapine reduction in transgene-free mutants.

Keywords:
CRISPR RNP genome editingDNA‐freePEG‐mediated protoplast transfectionantinutritional factorsrapeseed seedcakesinapinetransgene‐free mutants

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Area of Science:

  • Agricultural Science
  • Plant Biotechnology
  • Crop Improvement

Background:

  • Rapeseed is a vital global oil and protein crop, but antinutritional sinapine in seed meal limits its use in animal feed.
  • Conventional breeding has struggled to reduce sinapine levels effectively.
  • Maximizing crop utility is crucial due to climate change and population growth.

Purpose of the Study:

  • To generate transgene-free rapeseed mutants with reduced sinapine content using CRISPR-Cas gene editing.
  • To evaluate the efficacy of targeting Bna.SCT and Bna.REF1 genes for sinapine reduction.
  • To assess the impact of gene editing on plant growth and development.

Main Methods:

  • Utilized protoplast-based CRISPR RNP gene editing to target Bna.SCT and Bna.REF1 genes in rapeseed.
  • Achieved high editing efficiencies (22%-63%) and mutations in all four alleles using a single sgRNA.
  • Generated transgene-free T2 generation plants for analysis.

Main Results:

  • Successfully generated transgene-free rapeseed mutants.
  • Reduced seed sinapine content by up to 38% in Bna.SCT mutants and 77% in Bna.REF1 mutants.
  • Observed no adverse effects on plant growth or development in the generated mutants.

Conclusions:

  • CRISPR-Cas gene editing is a viable tool for producing transgene-free rapeseed with reduced sinapine.
  • The Bna.REF1 gene is the most effective target identified for significant sinapine reduction.
  • These findings support the enhanced utilization of rapeseed meal as a valuable protein source in animal feed.