Journal of Integrative Agriculture ›› 2017, Vol. 16 ›› Issue (02): 424-434.DOI: 10.1016/S2095-3119(16)61411-9

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  • 收稿日期:2016-01-23 出版日期:2017-02-20 发布日期:2017-01-31

Creation of gene-specific rice mutants by AvrXa23-based TALENs

WANG Fu-jun1, 2*, WANG Chun-lian1*, ZHENG Chong-ke1, QIN Teng-fei1, GAO Ying1, LIU Pi-qing2, ZHAO Kai-jun1   

  1. 1 National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Sciences, Chinese Academy of Agriculture Sciences (CAAS), Beijing 100081, P.R.China

    2 College of Agriculture, Guangxi University, Nanning 530004, P.R.China

  • Received:2016-01-23 Online:2017-02-20 Published:2017-01-31
  • Contact: ZHAO Kai-jun Tel: +86-10-82105852, Fax: 86-10-82108751, E-mail: zhaokaijun@caas.cn; LIU Pi-qing, Mobile: +86-13397700471, E-mail: liupq@gxu.edu.cn
  • About author:WANG Fu-jun, Tel: +86-10-82105852, E-mail: wej129@163.com; WANG Chun-lian, Tel: +86-10-82105852, E-mail: wangchunlian @caas.cn
  • Supported by:

    This work was supported by the grant from the Major Science and Technology Project to Create New Crop Cultivars Using Gene Transfer Technology of China (2014ZX0801001B) and the National Natural Science Foundation of China (31171812).

Abstract: Transcription activator-like effector (TALE) nucleases (TALENs) are increasingly used as a powerful tool for genome editing in a variety of organisms.  We have previously cloned the TALE-coding gene avrXa23 from Xanthomonas oryzae pv. oryzae and developed an AvrXa23-based assembly system for designer TALEs or TALENs.  Here, we exploit TALENs to induce mutagenesis of the rice ethylene response factor (ERF) transcription factor OsERF922 for testing the gene-editing efficiency of AvrXa23-based TALENs system.  A pair of TALENs (T-KJ9/KJ10) was assembled and their nuclease activities were first confirmed in rice protoplast transient assay.  The TALENs-expressing construct pT-KJ9/KJ10 was then used for rice transformation.  We observed targeting somatic mutagenesis frequency of 15.0% in positive transgenic rice calli and obtained two mutant plants with nucleotide deletion or insertion at the designer target region.  Our work demonstrates that the AvrXa23-based TALENs system can be used for site-specific genome editing in rice.

Key words: TAL effector nucleases, AvrXa23, targeting, OsERF922, genome editing, rice