Application of Rice Gene osdf1 and Its Regulatory Function of Disease Resistance
A rice and genetic technology, applied in the fields of application, genetic engineering, plant genetic improvement, etc., can solve the problems of limited range of available disease-resistant resources and long breeding cycle, and achieve a wide range of available disease-resistant resources, short cultivation cycle, and easy operation. Simple and convenient effect
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Embodiment 1
[0041] The present invention clones a rice gene, clarifies the broad-spectrum anti-bacterial regulation function of the gene by constructing overexpression transgenic rice for the first time, and reveals that the gene has a broad-spectrum negative regulation function on rice bacterial disease resistance. Therefore, the present invention named the gene Oryza sativa defense-related 1 (abbreviated as OsDF1). Because the overexpression of the OsDF1 gene leads to a significant decline in the resistance of rice to bacterial diseases, it is possible to create new rice materials with reduced resistance to rice bacterial diseases by constructing an overexpression of the OsDF1 gene in rice homozygous lines for gene function. analysis etc. The main steps for the cloning and functional analysis of the OsDF1 gene, and the creation and acquisition of new rice materials with reduced resistance to rice bacterial diseases include:
[0042] 1) Cloning and preservation of rice OsDF1 gene
[00...
Embodiment 2
[0075] According to the anti-bacterial negative regulatory function of the rice gene OsDF1 elucidated by the present invention as described above, a set of RNAi transgenic rice using the gene is established, and a new rice material with broad-spectrum resistance to rice bacterial diseases is created and obtained by using genetic engineering technology. Technology System. The main steps include:
[0076] (1) Construction and acquisition of OsDF1 gene RNAi structure
[0077] Design primer OsDF1-F2 (5'-ttggatcc gaa tct ttg gttgag aga agc-3' according to the OsDF1 sequence cloned in the present invention, the italic part is the Bam HI restriction site) (sequence shown in SEQ ID NO: 5), and OsDF1-R3 (5'-ttctcgag cat gct ctg aaa atg ctg ctg-3', the part in italics is the XhoI restriction site) (sequence shown in SEQ ID NO: 6). Using the pMD19-OsDF1 plasmid obtained in 1) of Example 1 as a template, and OsDF1-F2 / OsDF1-R3 as a primer pair, a 300bp OsDF1 fragment was obtained by PCR ...
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