Gene for controlling paddy tillering and usage
A gene and rice technology, applied in the direction of genetic engineering, plant gene improvement, application, etc., can solve the problems of unclear molecular mechanism of plant tillering, hovering rice production, etc., and achieve fast and high efficiency
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[0042] Example 1: Isolation and cloning of Osa-MIR156e gene
[0043] 1. Create a mutant library (T0 generation)
[0044] The vector pSMR-J18R was donated by CAMBIA (Center for the Application of Molecular Biology to International Agriculture) in Australia. As shown in Figure 1, the vector pSMR-J18R was introduced in the japonica rice variety Zhonghua 11 (Oryza sativa L.subsp.japonica) in a manner mediated by Agrobacterium EHA105. cv. Zhonghua 11) Randomly insert T-DNA (including Enhancer Trap) (Springer PS. Gene Traps: Tools for plant development and genomics. Plant Cell, 2000, 12: 1007-1020) into the genome to create a mutant library. The mutant library was constructed according to the method described by Wu et al. (Wu C et al., Development of enhancer trap lines for functional analysis of the rice genome. Plant J, 2003, 35:418-427). At present, about 100,000 independent transformants have been obtained.
[0045] 2. Field Screening of T1 Generation Tiller Characters
[0046] 3000...
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[0071] Example 2: Functional verification and application of Osa-MIR156 gene
[0072] 1. Construction of genetic transformation vector
[0073] The vector used is pU1301 constructed in our laboratory. pU1301 is a commonly used plant genetic transformation vector pCAMBIA1301 (Sun et al., 2004, Xa26, a gene conferring resistance to Xanthomonas oryzaepv.oryzae in rice, encoding a LRR receptor kinase-like protein. Plant Journal. 37: 517-527) A modified Agrobacterium-mediated genetic transformation vector carrying a corn ubiquitin promoter with constitutive and overexpression characteristics (Figure 7). The pCAMBIA1301 vector was donated by the Australian CAMBIA Laboratory (Center for the Application of Molecular Biology to International Agriculture). Use PCR method to expand the target gene SEQ.ID.No.1 directly from the rice genome, the total volume of the PCR reaction system is 20μl, rice genomic DNA template 1ul (about 50ng), 1×Taq enzyme reaction buffer, 25mM MgCL 2 1.2ul, 2mM dNTP...
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