浙江农业学报 ›› 2023, Vol. 35 ›› Issue (8): 1823-1833.DOI: 10.3969/j.issn.1004-1524.20230491

• 植物保护 • 上一篇    下一篇

cry1Ab-vip3Af2和cp4-epsps基因的抗虫耐除草剂水稻的研究

张思雨1(), 林朝阳1,2, 叶雨轩1,2, 沈志成1,*()   

  1. 1.浙江大学 昆虫科学研究所,浙江 杭州 310058
    2.浙江大学 新农村发展研究院,浙江 杭州 310058
  • 收稿日期:2023-04-18 出版日期:2023-08-25 发布日期:2023-08-29
  • 作者简介:张思雨(1998—),女,山西晋城人,硕士研究生,主要从事转基因水稻研究。E-mail:13327562932@163.com
  • 通讯作者: *沈志成,E-mail:zcshen@zju.edu.cn
  • 基金资助:
    农业农村部转基因重大专项(2016ZX08010-003)

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

摘要:

为培育抗虫耐除草剂转基因水稻(Oryza sativa L.),本研究将抗虫融合基因cry1Ab-vip3Af2与耐草甘膦基因cp4-epsps构建在同一T-DNA中,并利用农杆菌侵染法导入秀水134水稻。对获得的转化体的分子特征及抗虫耐除草剂性能进行分析研究,从众多转化体中筛选得到优良转化体VB3。High efficiency TAIL-PCR (Hi-Tail PCR)的分析结果表明,VB3转化体中外源T-DNA的插入位点未编码已知或预测的功能基因。DNA杂交印迹结果显示,VB3转化体的外源T-DNA以单拷贝的形式整合在水稻基因组中。酶联免疫吸附反应和蛋白质免疫印迹分析结果表明,T1、T2代VB3转化体的不同组织中均检测到较高的外源蛋白表达量,且不同世代之间表达量无明显差异。室内生测结果显示,VB3转化体对大螟(Sesamia inferens)、二化螟(Chilo suppressalis)和稻纵卷叶螟(Cnaphalocrocis medinalis)均表现出较高的抗性。三种靶标昆虫的幼虫取食VB3植物组织后,48 h的死亡率达到90%左右,72 h内全部死亡。草甘膦耐受性能测定结果表明,VB3转化体能够耐受20、40和80 mL·hm-2的草甘膦。综上所述,本研究筛选出的VB3转化体具有较好的生产应用前景。

关键词: 转基因, 害虫防治, 抗虫水稻, 耐除草剂水稻

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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