A seed-specific interference vector comprising postip3-1 promoter and its application

A technology that interferes with vectors and specificity, which is applied in the application and introduction of foreign genetic material using vectors, angiosperms/flowering plants, etc., can solve the problems of unclear direct regulation, decreased plant fertility and yield, and difficult practical application, etc. Achieve the effect of improving rice quality and increasing rice yield

Active Publication Date: 2022-07-12
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at the same time, the fertility and yield of interfering plants are extremely significantly reduced, making it difficult for practical application (Liao PF, Ouyang JX, Zhang JJ, et al. OsDCL3b affects grain yield and quality inferior[J]. Plant Molecular Biology, 2019, 99( 3): 193-204.)
[0007] At the same time, although the OsMADS1 gene has an important regulatory function on rice flower development, its direct regulation on rice seed development and rice quality development is still unclear, and there are no research reports on the application of OsMADS1 gene in improving rice protein content. and invention patents

Method used

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  • A seed-specific interference vector comprising postip3-1 promoter and its application
  • A seed-specific interference vector comprising postip3-1 promoter and its application
  • A seed-specific interference vector comprising postip3-1 promoter and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0075] Example 1: Construction of pOsTip3-1-RNAi vector

[0076] The pOsTip3-1-RNAi vector was constructed by using the homologous recombination directional cloning method to clone the promoter of the rice seed-specific expression gene OsTip3-1 into the plant constitutive RNA interference binary vector with hygromycin selection marker. pLHRNAi, and replace the original Ubiquitin constitutive expression promoter pUbi in the pLHRNAi vector to obtain the pOsTip3-1-RNAi seed-specific interference vector. Wherein, the pOsTip3-1 is the promoter of the OsTip3-1 gene. The construction flow chart and vector map of the pOsTip3-1-RNAi vector are as follows: figure 1 As shown, the specific construction method is as follows:

[0077] 1. OsTip3-1 gene expression profile analysis

[0078] 1. OsTip3-1 gene expression profile analysis based on gene chip database

[0079] Expression profile analysis of OsTip3-1 gene in Nipponbare (Nipponbare, rice variety, subspecies Japonica). First use Ric...

Embodiment 2

[0144] Example 2: Construction of pOsTip3-1::OsMADS1-RNAi vector

[0145] The schematic diagram of the structure of the pOsTip3-1::OsMADS1-RNAi vector and the main construction process are as follows Figure 7 shown. The specific operation method is as follows:

[0146] 1. OsMADS1 gene expression profile analysis

[0147] 1. Transcriptional profiling of OsMADS1 gene based on gene chip database

[0148] Firstly, the expression profile of OsMADS1 (gene number: Os03g0215400) gene in Nipponbare was analyzed using RiceXPro rice gene chip expression database. Figure 8 As shown (you need to enter the URL http: / / ricexpro.dna.affrc.go.jp / category-select.php according to the picture, enter Os03g0215400 in the Search options in the webpage, then click search, and then click FeatureNum in the new webpage After entering the number, check the Spatio-temporal profile on the new web page, you can query this graph, and click Downloadselected graph on the web page to get this graph). OsMA...

Embodiment 3

[0239] Example 3: Specific application and effect display of pOsTip3-1::OsMADS1-RNAi seed-specific interference vector

[0240] 1. The pOsTip3-1::OsMADS1-RNAi and pUbi::OsMADS1-RNAi plasmids constructed in Example 2 and Comparative Example were sent to Hangzhou Baige Biotechnology Co., Ltd. to transform the rice variety Nipponbare respectively. The conversion process is as follows:

[0241] 1. Callus induction and subculture of rice mature seeds

[0242] Pick mature rice seeds, peel off the glumes, pour them into a 50ml centrifuge tube, add 75% ethanol for sterilization for 1 min, pour off the ethanol, rinse with sterile water, and then pour out, add 30% sodium hypochlorite for disinfection for 20 minutes, pour out the sodium hypochlorite, use Rinse with sterile water 5 to 6 times. Remove excess water with a pipette and transfer the seeds to induction medium, 20 to 25 seeds per dish. After the callus grows, the original embryo can be used for direct transformation; the smal...

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Abstract

The invention belongs to the field of biotechnology, and in particular relates to a seed-specific interference vector comprising a pOsTip3-1 promoter and an application thereof. Specifically, a seed-specific interference vector is provided, and the vector is a pOsTip3-1-RNAi vector, and its DNA sequence is shown in SEQ ID NO 9. The pOsTip3-1-RNAi vector can specifically interfere with the expression of the target gene in rice seeds without affecting the normal expression of the target gene in other tissues and organs, thereby not only effectively studying the direct effect of the target gene on seed development It can also achieve the purpose of improving rice grain shape, yield and rice quality, providing an effective technical means and solution for molecular precision design and breeding of rice yield and rice quality. At the same time, an OsMADS1 seed-specific interference vector pOsTip3-1::OsMADS1-RNAi based on the pOsTip3-1-RNAi vector is also provided, the DNA sequence of which is shown in SEQ ID NO 10; the use of the vector can improve the protein content in rice , increase the nutritional value of rice. The invention has important scientific research significance and application value.

Description

technical field [0001] The invention belongs to the field of biotechnology, in particular to a seed-specific interference vector comprising a pOsTip3-1 promoter and its application. Background technique [0002] Rice is the staple food for more than half of the world's population and a basic source of starch and protein for humans. The growth and development of rice seeds not only controls the thousand-grain weight, which is one of the three elements of rice yield, but is also an important factor that directly determines the nutritional quality of rice such as rice protein content. The morphological development and protein content of rice seeds are regulated by a series of important genes. Therefore, studying the functions of these important regulatory genes and their regulatory mechanisms on seed morphological development and rice protein content is the basis for using these important genes to carry out precise seed design breeding and genetic engineering breeding, and to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/82C12N15/113C12N15/66A01H5/10A01H6/46
CPCC12N15/8218C12N15/8234C12N15/8251C12N15/8261C12N15/8267C12N15/66
Inventor 李辉李鹏慧黄维藻涂升斌汪松虎蒋海波刘志坚古袁扬庄勇刘阳轩魏明唐钰莹乐露胡永志路龙祥喻兰
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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