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- W2912243995 abstract "Summary CRISPR /Cas9 has been widely used for genome editing in many organisms, including important crops like wheat. Despite the tractability in designing CRISPR /Cas9, efficacy in the application of this powerful genome editing tool also depends on DNA delivery methods. In wheat, the biolistics based transformation is the most used method for delivery of the CRISPR /Cas9 complex. Due to the high frequency of gene silencing associated with co‐transferred plasmid backbone and low edit rate in wheat, a large T 0 transgenic plant population are required for recovery of desired mutations, which poses a bottleneck for many genome editing projects. Here, we report an Agrobacterium ‐delivered CRISPR /Cas9 system in wheat, which includes a wheat codon optimized Cas9 driven by a maize ubiquitin gene promoter and a guide RNA cassette driven by wheat U6 promoters in a single binary vector. Using this CRISPR /Cas9 system, we have developed 68 edit mutants for four grain‐regulatory genes, Ta CKX 2‐1 , Ta GLW 7 , Ta GW 2, and Ta GW 8 , in T 0 , T 1 , and T 2 generation plants at an average edit rate of 10% without detecting off‐target mutations in the most Cas9‐active plants. Homozygous mutations can be recovered from a large population in a single generation. Different from most plant species, deletions over 10 bp are the dominant mutation types in wheat. Plants homozygous of 1160‐bp deletion in Ta CKX 2‐D1 significantly increased grain number per spikelet. In conclusion, our Agrobacterium ‐delivered CRISPR /Cas9 system provides an alternative option for wheat genome editing, which requires a small number of transformation events because CRISPR /Cas9 remains active for novel mutations through generations." @default.
- W2912243995 created "2019-02-21" @default.
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- W2912243995 date "2019-03-12" @default.
- W2912243995 modified "2023-10-18" @default.
- W2912243995 title "Development of an <i>Agrobacterium</i> ‐delivered <scp>CRISPR</scp> /Cas9 system for wheat genome editing" @default.
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- W2912243995 doi "https://doi.org/10.1111/pbi.13088" @default.
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