Application of cotton GbCaMBP gene in verticillium wilt resisting of plants
A technology of resistance to verticillium wilt and gene, applied in the field of plant genetic engineering, can solve the problems of affected expression and so on
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experiment example 1
[0028] Experimental example 1: Cloning and bioinformatics identification of cotton calmodulin-binding protein gene GbCaMBP
[0029] 1. Cloning of GbCaMBP gene of sea island cotton
[0030] ① According to the extraction steps in the manual of Aidlab's EASYspin Plus Plant RNA Rapid Extraction Kit, extract the total RNA of Sea Island cotton Xinhai 15 varieties and reverse transcribe it into cDNA, and dilute the cDNA concentration to 50-60ng / μL. The seeds of sea-island cotton Xinhai 15 were provided by the Cotton Research Institute of the Chinese Academy of Agricultural Sciences.
[0031] ②The EST sequence of a calmodulin-binding protein gene was screened out through transcriptome sequencing analysis, and sequenced in the sea island cotton database of Huazhong Agricultural University (http: / / cotton.cropdb.org / cotton / tools / blast.php) Alignment, a complete cDNA sequence was compared, and a pair of amplification primers (F: ATGGGATTGTCTCTTTTCATTGC; R: TTAGCCCACTGTTGCTATAG) were desi...
experiment example 2
[0039] Experimental example 2: GbCaMBP promoter sequence cloning and bioinformatics analysis
[0040] Use (https: / / phytozome.jgi.doe.gov / pz / portal.html#!search?show=BLAST) software to find out the promoter sequence of GbCaMBP online, and amplify GbCaMBP from the genomic DNA of Gymnosporum xinhai 15 A 914bp sequence upstream of the start codon (ATG) was obtained. Using the promoter transcription start site prediction software TSSP to analyze this sequence, it is predicted that the transcription start site of GbCaMBP is the 44th base upstream of ATG (+1, A).
[0041] Use (http: / / bioinformatics.psb.ugent.be / webtools / plantcare / html / ) software to predict and analyze the cis-acting elements on the promoter sequence online, and the predicted results are as follows image 3 As shown, in addition to the core promoter sequence (TATA-box and CAAT-box), the promoter sequence of GbCaMBP also contains light-sensitive elements (Box I, G-box), fungal induction response elements (Box-W1) and ...
experiment example 3
[0042] Experimental Example 3: Correlation between GbCaMBP gene and cotton resistance to Verticillium wilt
[0043] 1. Analysis of the expression pattern of GbCaMBP gene in cotton
[0044] Cotton of sea-island cotton Xinhai 15 was planted, and when the cotton seedlings grew for about 3 weeks, the cotyledon, true leaf, stem, stem tip and root of cotton were taken as samples to analyze the tissue expression pattern of GbCaMBP gene. First, extract RNA from the sample that has been taken, then reverse transcribe it into a cDNA template, and dilute it to 10-20ng / μL, and use qRT-PCR technology to organize the GbCaMBP gene using the ABI7500 Real Time PCR system (Applied Biosystems, USA) For expression pattern analysis, G. gossypii Ubiquitin 7 (UBQ7) was used as an internal reference gene.
[0045] The upstream and downstream primers of the GbCaMBP gene were designed as follows:
[0046] F: GATTGGTTGCTCGTGATGG
[0047] R: GCTTGCCCGTATGAGTTGT;
[0048] The primers for the upstream ...
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