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Two-guide CRISPR tool makes gene knockouts in poplar trees far simpler

PubMed · 2026-07-05

Scientists developed a faster, more reliable method to knock out genes in poplar trees using a two-guide CRISPR system that deletes large chunks of DNA instead of making tiny edits, making it much easier to confirm the mutation worked.

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Dual-gRNA CRISPR/Cas9 strategy reliably deletes genomic fragments larger than 50 bp, compared to the small indels typical of single-gRNA approaches.

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Mutant trees can be identified by conventional PCR and agarose gel electrophoresis, eliminating the need for routine DNA sequencing during screening.

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The protocol was validated using the PtFBX230 gene in Populus tremula x P. alba clone INRA 717-1B4 and is designed to be transferable to other loci and related woody species.

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