Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (8): 1823-1833.DOI: 10.3969/j.issn.1004-1524.20230491

• Plant Protection • Previous Articles     Next Articles

Characterization of transgenic insect resistance and glyphosate tolerance rice expressing cry1Ab-vip3Af2 and cp4-epsps

ZHANG Siyu1(), LIN Chaoyang1,2, YE Yuxuan1,2, SHEN Zhicheng1,*()   

  1. 1. Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China
    2. The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
  • Received:2023-04-18 Online:2023-08-25 Published:2023-08-29

Abstract:

In order to develop a transgenic rice (Oryza sativa L.) with insect resistance and herbicide tolerance, a T-DNA with both expression cassettes of the insecticidal fusion gene cry1Ab-vip3Af2 and glyphosate tolerance gene cp4-epsps was constructed and transferred into japonica rice Xiushui 134. A leading event named VB3 was selected based on molecular characterization, insect-resistance and herbicide-tolerance assays. Hi-Tail PCR suggested that the T-DNA insertion site of VB3 does not encode any known or predicted functional genes. Southern blotting suggested that the VB3 was a single copy insertion event. The enzyme-linked immunosorbent assay and Western blotting showed that the exogenous proteins were detected at high levels in different tissues of VB3, and had no significant difference among different generations. The laboratory bioassay showed that the VB3 was highly resistant to Sesamia inferens, Chilo suppressalis and Cnaphalocrocis medinalis. The mortality of three target insect larvae on VB3 was about 90% in 48 hours and 100% in 72 hours. The glyphosate tolerance test showed that the VB3 showed no visible damage with 20、40 and 80 mL·hm-2 of recommended glyphosate dosage respectively. In collusion, the VB3 event has potential value for possible commercial development.

Key words: transgenic, pest control, insect resistance rice, herbicide tolerance rice

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