An improved plant CRISPR-Cas9 system for generating Cas9-free multiplex mutants

Biotechnology & Biotechnological Equipment

Jun-Li Wang¹  Luo-Yu Liang¹  Wang Guo¹  Lei Wu¹  Ya-Jie Zou¹  Nan Lang¹  Yu-Yang Li¹  Xiao-Feng Li¹  Jian Cui¹  Guang-Qin Guo¹  Qiong-Hui Fei¹  Hai-Qin Liu¹ 

[1] Department of MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University;

关键词: crispr-cas9;    multiplex genome editing;    in-fusion cloning technology;   

DOI  :  10.1080/13102818.2021.1986132

来源: DOAJ

【 摘 要 】

CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats)-Cas9 mediated gene editing systems have been used in a variety of organisms, including plants. This system can efficiently edit target genes to generate mutants, especially multiplex mutants, which are invaluable genetic materials for gene functional studies. Although the use of traditional hybridization technology to construct multiplex mutants has been widely used in plant research, the complex screening and identification, long construction cycle and other problems have always troubled researchers. Therefore, in the current plant science research, the use of CRISPR-Cas9 mediated multiplex genome editing to construct multiplex mutants has become a mainstream technology. Here, we designed an improved plant CRISPR-Cas9 mediated multiplex genome vector system. The In-fusion cloning technology was selected to conveniently assemble multiple tandem sgRNA (Single-guide RNA) expression frames. In this system, Cas9-free plants can be easily selected by examining mCherry fluorescence in T2 transgenic plants. By using this system, Cas9-free homozygous triple mutant was obtained, demonstrating the availability of our system.

【 授权许可】

Unknown