抗草铵膦除草剂转基因油菜新种质的创制及鉴定
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作者单位:

1.湖北洪山实验室;2.华中农业大学作物遗传改良国家重点实验室;3.华中农业大学植物科学技术学院

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国家转基因生物新品种培育重大专项(2018ZX08020001)


Development and Identification of Transgenic Rapeseed Resistant to Herbicide Glufosinate
Author:
Affiliation:

1.Hubei Hongshan Laboratory;2.National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University;3 .College of Plant Science & Technology, Huazhong Agricultural University

Fund Project:

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

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    摘要:

    草铵膦是一种在世界范围内广泛使用的内吸型除草剂。目前,我国还未研发出具有自主知识产权的抗草铵膦除草剂油菜品种。本研究通过油菜下胚轴的遗传转化方法成功将一个新型草铵膦抗性基因Syn1-RePAT转化到甘蓝型油菜中,通过筛选获得了27株阳性单株。利用Southern blot技术筛选出其中的单拷贝T-DNA插入株系,并通过后代分离比检测对重要株系进行了拷贝数验证。利用Inverse-PCR技术对OV40-7、OV40-15、OV40-16和OV40-17等转化体进行T-DNA侧翼序列分析与比对,分离获得了各转基因株系的插入位点信息。对不同转化体株系设计特异性引物,通过PCR技术检测外源基因序列在T1~T3代材料的整合稳定性。RT-PCR和qRT-PCR表达分析证实,Syn1-RePAT转基因在多个转化株系的不同世代稳定超量表达。对T1代转化体进行功能鉴定,各转化体对草铵膦具有良好的抗性,至少可耐受6倍田间推荐施用剂量的草铵膦。本研究所创建的新型抗草铵膦油菜种质资源极具应用前景,为我国抗草铵膦良种培育工作奠定了重要的基础。

    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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吴潞梅,覃 萍,闫 彤,等.抗草铵膦除草剂转基因油菜新种质的创制及鉴定[J].植物遗传资源学报,2022,23(6):1696-1708.

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  • 收稿日期:2022-05-23
  • 最后修改日期:2022-07-25
  • 录用日期:2022-08-17
  • 在线发布日期: 2022-11-16
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