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High-throughput genome editing in rice with a virus-based surrogate system

摘要With the widespread use of clustered regularly interspaced palindromic repeats (CRISPR)/CRISPR-associated nuclease (Cas) tech-nologies in plants, large-scale genome editing is increasingly needed. Here, we developed a geminivirus-mediated surrogate system, called Wheat Dwarf Virus-Gate (WDV-surrogate), to facilitate high-throughput genome editing. WDV-Gate has two parts: one is the recipient callus from a transgenic rice line expressing Cas9 and a mutated hygromycin-resistant gene (HygM) for surrogate selection; the other is a WDV-based construct expressing two single guide RNAs (sgRNAs) targeting HygM and a gene of interest, respectively. We evaluated WDV-Gate on six rice loci by producing a total of 874 T0 plants. Compared with the conventional method, the WDV-Gate system, which was characterized by a transient and high level of sgRNA expression, significantly increased editing frequency (66.8% vs. 90.1%), plantlet regeneration efficiency (2.31-fold increase), and numbers of homozygous-edited plants (36.3%vs. 70.7%). Large-scale editing using pooled sgRNAs targeting the SLR1 gene resulted in a high editing frequency of 94.4%, further dem-onstrating its feasibility. We also tested WDV-Gate on sequence knock-in for protein tagging. By co-delivering a chemically modified donor DNA with the WDV-Gate plasmid, 3xFLAG pep-tides were successfully fused to three loci with an efficiency of up to 13%. Thus, by combining transiently expressed sgRNAs and a surrogate selection system, WDV-Gate could be useful for high-throughput gene knock-out and sequence knock-in.

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作者 Yifu Tian [1] Dating Zhong [2] Xinbo Li [1] Rundong Shen [1] Han Han [3] Yuqin Dai [4] Qi Yao [2] Xuening Zhang [2] Qi Deng [5] Xuesong Cao [4] Jian-Kang Zhu [6] Yuming Lu [2] 学术成果认领
作者单位 Shanghai Center for Plant Stress Biology,Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 201602,China;Center for Advanced Bioindustry Technologies,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Hainan Yazhou Bay Seed Lab,Sanya 572024,China [1] Shanghai Center for Plant Stress Biology,Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 201602,China;Shanghai Collaborative Innovation Center of Agri-Seeds,Joint Center for Single Cell Biology,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China [2] Shanghai Collaborative Innovation Center of Agri-Seeds,Joint Center for Single Cell Biology,School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China [3] Shanghai Center for Plant Stress Biology,Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 201602,China [4] Center for Advanced Bioindustry Technologies,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China [5] Shanghai Center for Plant Stress Biology,Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 201602,China;Center for Advanced Bioindustry Technologies,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Hainan Yazhou Bay Seed Lab,Sanya 572024,China;Institute of Advanced Biotechnology,School of Life Sciences,Southern University of Science and Technology,Shenzhen 518055,China [6]
栏目名称 New Technology
发布时间 2023-03-21
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植物学报(英文版)

植物学报(英文版)

2023年65卷3期

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