CRISPR/Cas9-mediated efficient targeted mutagenesis in Chardonnay (Vitis vinifera L.)!

Sci Rep. 2016 Aug 31;6:32289. doi: 10.1038/srep32289.

CRISPR/Cas9-mediated efficient targeted mutagenesis in Chardonnay (Vitis vinifera L.).

Ren C1,2, Liu X1,2, Zhang Z1,2, Wang Y1,2, Duan W1, Li S1, Liang Z1,3.

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The type II clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 system (CRISPR/Cas9) has been successfully applied to edit target genes in multiple plant species. However, it remains unknown whether this system can be used for genome editing in grape. In this study, we described genome editing and targeted gene mutation in ‘Chardonnay’ suspension cells and plants via the CRISPR/Cas9 system. Two single guide RNAs (sgRNAs) were designed to target distinct sites of the L-idonate dehydrogenase gene (IdnDH). CEL I endonuclease assay and sequencing results revealed the expected indel mutations at the target site, and a mutation frequency of 100% was observed in the transgenic cell mass (CM) as well as corresponding regenerated plants with expression of sgRNA1/Cas9. The majority of the detected mutations in transgenic CM were 1-bp insertions, followed by 1- to 3-nucleotide deletions. Off-target activities were also evaluated by sequencing the potential off-target sites, and no obvious off-target events were detected. Our results demonstrated that the CRISPR/Cas9 system is an efficient and specific tool for precise genome editing in grape.

PMID: 27576893
PMCID: PMC5006071
DOI: 10.1038/srep32289

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