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Application of oscct6 gene in controlling rice yield, flowering period and plant height

A gene, rice technology, applied in the application, genetic engineering, plant genetic improvement and other directions, can solve the problem that the CCT gene has not been functionally verified.

Inactive Publication Date: 2019-03-29
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently, most of the CCT genes in rice have not been functionally verified

Method used

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  • Application of oscct6 gene in controlling rice yield, flowering period and plant height
  • Application of oscct6 gene in controlling rice yield, flowering period and plant height
  • Application of oscct6 gene in controlling rice yield, flowering period and plant height

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Isolation of OsCCT6 gene gDNA sequence

[0023] The OsCCT6 gene (LOC_Os06g44450) corresponding to the present invention has its genome sequence (http: / / rice.plantbiology.msu.edu / cgi-bin / sequence_display.edu) published in the TIGR database (http: / / rice.plantbiology.msu.edu). cgi?orf=LOC_Os06g44450.1). Total DNA was extracted from rice variety "Minghui 63" (MH63) leaves by conventional PCR method (see: Dieffenbacher C W, Devickler QS, Guide to PCR Technique Experiment, Beijing, Science Press, 1998), amplified The gDNA sequence of OsCCT6 was obtained. The specific amplification method of gDNA is as follows:

[0024] 1 Extract the total DNA from the leaves of the rice variety MH63. The DNA extraction method refers to the CTAB method (see Zhang et al., genetic diversity and differentiation of indica an japonica rice detected by RFLP analysis, 1992, Theor Appl Genet, 83, 495-499).

[0025] 2 Then predict the ORF of the gene according to the TIGR database (http:...

Embodiment 2

[0030] Embodiment 2: Construction of OsCCT6 overexpression vector

[0031] 1 Digest the above T / A clone with OsCCT6 genome sequence with Kpn I and Xba I, recover the target band, and digest the binary overexpression vector pCAMBIA 1301S with Kpn I and Xba I (provided by Huazhong Agricultural University Crop Genetics Provided by Mr. Lian Xingming from the State Key Laboratory of Improvement, see the attached vector diagram figure 1 ) connection (the endonucleases used were all purchased from Treasure Bioengineering Dalian Co., Ltd., and the usage and dosage were in accordance with the product instructions provided by the company; the ligase was a product of Shanghai Handsome Biotechnology Co., Ltd., and the usage and dosage were in accordance with the company’s product instructions) ;

[0032] 2. The ligation product was introduced into Escherichia coli DH10B (purchased from Promega (Beijing) Biotechnology Co., Ltd., Promega, USA) by electroporation (the electroporation instru...

Embodiment 3

[0034] Example 3: Transformation of binary Ti plasmid vector and detection of positive and expression levels of transgenic plants

[0035] 1 The correct sequenced overexpression vector pCAMBIA 1301S-OsCCT6-MH63 was introduced into Agrobacterium (A. tumefaciens) EHA105 (purchased from Australia CAMBIA laboratory) strains;

[0036] 2 Transform the overexpressed Agrobacterium in step 1 into the rice recipient variety "Zhonghua 11" (a rice variety publicly reported and released by the Institute of Crop Science, Chinese Academy of Agricultural Sciences)

[0037] 3 The main steps of the genetic transformation of the present invention, the culture medium and the preparation method thereof are as follows:

[0038] 1) Reagent and solution abbreviation

[0039] The abbreviation of the plant hormone used in culture medium among the present invention is as follows: 6-BA (6-BenzylaminoPurine, 6-benzyl adenine); CN (Carbenicillin, carbenicillin); KT (Kinetin, kinetin); NAA ( Napthalene a...

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Abstract

The invention belongs to the technical field of plant genetic engineering and particularly relates to an application of an OsCCT6 gene in control on yield, blossom period and plant height of paddy rice. The DNA sequence of the OsCCT6 gene is represented as the SEQ ID No.1, wherein the sequence of cDNA of the OsCCT6 gene is represented as the SEQ ID No.2. The sequence of protein encoded by the gene is represented as the SEQ ID No.3. The sequence of allele of the OsCCT6 gene is represented as the SEQ ID No.4. In the invention, through excessive expression of OsCCT6-MH63 gene in paddy rice Zhonghua 11, rice ears are increased in transgenic progenies, wherein the number of filled grains in each ear is increased by about 80%, yield per plant (weight of a filled grain) is increased by about 70%, blossom period is significantly delayed by about 45 days, and the plant height is increased by about 10 cm. The OsCCT6 gene is proved to have the function of regulating the yield, the blossom period and the plant height of the paddy rice. The invention provides novel gene resources for heredity and improvement on the paddy rice.

Description

technical field [0001] The invention relates to the technical field of plant genetic engineering. It specifically relates to the application of OsCCT6 gene in controlling rice yield, flowering period and plant height. Background technique [0002] Rice is one of the most important food crops, so the research on improving its yield is of great significance. Rice yield traits are complex quantitative traits, which consist of three main factors: effective panicle number, spikelet number per panicle, and grain weight (YongzhongXing and Qifa Zhang, 2010, Annu.Rev.Plant Biol.61:421-442) . Among them, the effect of increasing the yield by increasing the number of grains per spike is the most obvious. In recent years, many yield-related genes have been cloned by map-based cloning method of forward genetics, such as Gn1a, LAX1, SPA, FZP, SP1, DEP1, Ghd7, Ghd7.1, Ghd8 / DTH8 (Motoyuki Ashikari et al., 2005, Science 309:741-745; Keishi Komatsu et al., 2003, Proc.Natl.Acad.Sci.100:11...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/29C07K14/415C12N15/84A01H5/00A01H6/46
Inventor 邢永忠董海娇
Owner HUAZHONG AGRI UNIV