Application of GmLCL3 gene in regulating photoperiod and flowering time of soybeans and increasing yield of soybeans
A technology of flowering time and photoperiod, applied in the genetic field, can solve problems such as unclear molecular mechanisms, achieve the effect of inhibiting plant flowering and have broad application prospects
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Embodiment 1
[0037] 1. Construction of soybean lcl3 mutant
[0038] (1) Find the full-length sequence of LCL3 through the soybean genome online search software Phytozome (https: / / phytozome.jgi.doe.gov) (the amino acid sequence is shown in SEQ ID NO.1; the nucleotide sequence is shown in SEQ ID NO.2 shown), according to the exon sequence of the GmLCL3 gene in the soybean genome, a target primer (upstream primer F1: 5'-AAGAGAACG ATGGACAGAGG-3 '; Downstream primer R1: 5'-AAACCCTCTGTCCATCGTTCTCT-3') (for target location information and mutant plant editing methods, see figure 1 ), the oligonucleotide chain primers used were synthesized by Ruibo Sequencing Company.
[0039](2) The pYLgRNA vector used in the mutant creation experiment is transformed from the pUC18 vector with a size of about 3kb; the Cas9 vector pYLCRISPR / Cas9-DB is about 15.5kb in size and contains a Bar gene driven by a 35S promoter and a 35S promoter Driven Cas9 gene, terminator, ccdB E. coli lethal gene; pYLgRNA vector, pY...
Embodiment 2
[0048] 1. Phenotypic identification of LCL3 near-isogenic plants
[0049] (1) Screen the genetic variation of LCL3 from 720 resequenced varieties (sequenced by Guao Fund Company, and the sequenced varieties are collected from various regions in China and some parts of the world by the Molecular Genetics and Evolution Innovation Research Center of Guangzhou University) to obtain An effective natural variation, the variation is an amino acid substitution, resulting in a stop codon, which can cause the LCL3 protein to terminate prematurely (at position 478, the base A is mutated to T, and the amino acid K is mutated to a terminator), which is named: soybean Mutant Harosoy (LCL3).
[0050](2) By combining the soybean variety Harosoy (LCL3) with PI 628930 (references: Fang C, Chen L, et al. Rapid identification of consistent novel QTLs underlying long-juveniletrait in soybean by multiple genetic populations and genotyping-by-sequencing [J]. Mol Breeding, 2019, 39:1-11.) Crossing a...
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