Development and Identification of Transgenic Rapeseed Resistant to Herbicide Glufosinate
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1.Hubei Hongshan Laboratory;2.National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University;3 .College of Plant Science & Technology, Huazhong Agricultural University

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National Major Project for Developing New GM Crops (2018ZX08020001)

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    Abstract:

    Glufosinate is a non-selective broad-spectrum herbicide applicable in weeds control worldwide. However, in China there is no glufosinate-tolerant rapeseed variety with independent intellectual property rights to date. In this study, a glufosinate-resistant gene Syn1-RePAT was successfully transformed to the Brassica napus via Agrobacterium tumefaciens-mediated hypocotyl method, and 27 transgenic plants were obtained. The transgenic lines with a single copy of T-DNA insertion were identified by Southern blot analysis, and some of them on T-DNA copy number variation were analyzed by progeny segregation assay. The T-DNA insertion sites in the lines of OV40-7, OV40-15, OV40-16 and OV40-17 were identified by inverse PCR method. The stability of the T-DNA insertion was further confirmed by insertion-specific PCR in their T1 to T3 generations. RT-PCR and qRT-PCR expression analysis revealed that the Syn1-RePAT gene was stably overexpressed in different generations of transgenic lines. Treatments with different doses of glufosinate indicated that lines OV40-6, OV40-7 and OV40-16 were tolerant to at least six times of the recommended dose of glufosinate in production. Thus, the novel glufosinate -tolerant rapeseed lines generated in the present study will lay the foundation for the herbicide- tolerance rapeseed breeding in China.

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History
  • Received:May 23,2022
  • Revised:July 25,2022
  • Adopted:August 17,2022
  • Online: November 16,2022
  • Published:
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