Targeted genome modifications in soybean with CRISPR/Cas9

BMC Biotechnology

Thomas B Jacobs¹  Peter R LaFayette²  Robert J Schmitz³  Wayne A Parrott² 

[1] Present address: Boyce Thompson Institute for Plant Research, Ithaca 14853, NY, USA

[2] Center for Applied Genetic Technologies, University of Georgia, Athens 30602, GA, USA

[3] Department of Genetics, University of Georgia, Athens 30602, GA, USA

关键词: Hairy roots;    Gene targeting;    Genomic engineering;    Soybean;    Plant transformation;    CRISPR/Cas9;   

Others  :  1138349
DOI  :  10.1186/s12896-015-0131-2

 received in 2014-09-26, accepted in 2015-02-27,  发布年份 2015

【 摘 要 】

Background

The ability to selectively alter genomic DNA sequences in vivo is a powerful tool for basic and applied research. The CRISPR/Cas9 system precisely mutates DNA sequences in a number of organisms. Here, the CRISPR/Cas9 system is shown to be effective in soybean by knocking-out a green fluorescent protein (GFP) transgene and modifying nine endogenous loci.

Results

Targeted DNA mutations were detected in 95% of 88 hairy-root transgenic events analyzed. Bi-allelic mutations were detected in events transformed with eight of the nine targeting vectors. Small deletions were the most common type of mutation produced, although SNPs and short insertions were also observed. Homoeologous genes were successfully targeted singly and together, demonstrating that CRISPR/Cas9 can both selectively, and generally, target members of gene families. Somatic embryo cultures were also modified to enable the production of plants with heritable mutations, with the frequency of DNA modifications increasing with culture time. A novel cloning strategy and vector system based on In-Fusion® cloning was developed to simplify the production of CRISPR/Cas9 targeting vectors, which should be applicable for targeting any gene in any organism.

Conclusions

The CRISPR/Cas9 is a simple, efficient, and highly specific genome editing tool in soybean. Although some vectors are more efficient than others, it is possible to edit duplicated genes relatively easily. The vectors and methods developed here will be useful for the application of CRISPR/Cas9 to soybean and other plant species.

【 授权许可】

   
2015 Jacobs et al.; licensee BioMed Central.

【 图 表 】

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