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A gene os02g0532500 for improving rice blast resistance, protein and application thereof

A rice blast and resistance technology, applied in the field of crop genetics, can solve problems such as difficult and effective implementation, and achieve the effects of ensuring production safety, enhancing rice blast resistance, and improving rice blast resistance

Inactive Publication Date: 2019-04-23
RICE RES INST GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selection of molecular markers is often affected by parental polymorphism and recombination, making it difficult to effectively carry out molecular breeding for rice blast resistance

Method used

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  • A gene os02g0532500 for improving rice blast resistance, protein and application thereof
  • A gene os02g0532500 for improving rice blast resistance, protein and application thereof
  • A gene os02g0532500 for improving rice blast resistance, protein and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 Improving the gene of rice blast resistance and the construction of overexpression vector

[0023] (1), get the seedling leaf position of Sanhuangzhan No. 2 (SHZ-2) of rice blast high-resistant variety, use TriZolReagent (Invitrogen company, its article number is: 15596026) to extract leaf total RNA, adopt formaldehyde denaturing gel electrophoresis and The purity and quantity of total RNA were detected by ultraviolet spectrophotometer;

[0024] (2) Take 1 μg of total RNA for the initial reverse transcription reaction, the reverse transcriptase used is PrimeScript (TAKARA company), and the steps of the reverse transcription reaction refer to the instructions for use of the reverse transcriptase. Using the reverse transcription product as a template, primers: F, CCGGAATTCAGTGACAGAACGAGCGTAGAAT (SEQ ID No: 3); R, GGAAGATCTTCACTAACGGGGAGTAACCTAA (SEQ ID No: 4) were used for PCR amplification. The polymerase used in PCR was KOD FX (Toyobo Company). The reactio...

Embodiment 2

[0027] Example 2 Identification of overexpression effect of Os02g0532500 gene in transgenic plants

[0028] The overexpression vector was transformed into the normal japonica rice variety Nipponbare by the method of genetic transformation mediated by Agrobacterium EHA105. Transformed primary (T 0 Generation) Through PCR and quantitative PCR detection, positive transformed plants were identified from the DNA level and RNA level, proving that the target gene Os02g0532500 has been transformed into rice, and the expression of the target gene Os02g0532500 has been increased.

[0029] In a controlled greenhouse, the transgenic positive plants were selfed to obtain the first generation of homozygous positive transgenes (T 1 Generation) strains, each strain selects 10 plants that are positive by PCR detection and multiplies, and obtains T 2 generation plant, T 2 The generation strains were then tested by PCR to find out the strains derived from different T 0 T 2 There were 3 homo...

Embodiment 3

[0037] Example 3 Identification of rice blast resistance in transgenic plants overexpressing Os02g0532500

[0038] 1. Leaf blast phenotype identification

[0039] 3 homozygous overexpression transgene T in embodiment 2 2 The generation strains (OX-2, OX-11, OX-15) and wild-type rice seeds germinated at 32°C. After 2 days, the young shoots were transferred to plastic trays filled with soil for sowing. Each strain and wild-type Sow 30 seeds separately, one plastic tray contains 3 transgenic lines and wild-type lines, and 3 biological replicates. When the seedlings grew to the 3-leaf stage under natural conditions, the seedlings were transplanted into an artificial climate box for inoculation.

[0040] The artificial climate box was set as follows: temperature, 25°C; light, 16000 LUX; 12h day and night; humidity, 100%. The rice blast strain used was Nipponbare-sensitive GD08-T13. Strains (at a concentration of 1x 10 6 spores / ml) was sprayed on the leaves, cultivated in tota...

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Abstract

The invention discloses a gene Os02g0532500 and a protein which are capable of improving rice blast resistance, and applications of the gene. The gene has a nucleotide sequence shown as SEQ ID No:1. The Os02g0532500 which is a rice GLP gene is proved to be a functional gene for rice blast resistance for the first time. Cloning and biological function verification of the gene have great reference significance for molecular mechanism research of the rice blast resistance. The expression quantity of the Os02g0532500 is greatly increased after rice is transformed with a rice transformation overexpression vector over-expressing the Os02g0532500 gene, rice blast resistance of transformed plants is obviously improved along with the increased expression quantity, and growth states and agronomic traits of transgenic plants are hardly changed. An Os02g0532500 overexpression technique can be applied for genetic engineering breeding of rice, and can be applied to production practice to improve the rice blast resistance, thus ensuring rice production safety under weather conditions with frequent rice diseases at present.

Description

technical field [0001] The invention belongs to the technical field of crop genetics, and more specifically, the invention relates to a gene Os02g0532500 for improving resistance to rice blast, protein and application thereof. Background technique [0002] Rice blast caused by the fungus Magnaporthe grisea (Hebert) Barr is one of the most serious rice diseases in the world, and has a devastating impact on global rice cultivation. Rice blast may occur in all stages of rice growth, especially leaf blast and ear blast are the most harmful. The output loss caused by rice blast is 11% to 30% every year in the world, and the direct economic loss is about 5 billion US dollars, and the lost grain is enough to feed 60 million people. In my country, rice blast occurs wherever rice is cultivated. The northern and southern rice fields are affected to varying degrees every year, generally with a 10-20% reduction in production, and 40-50% in severe cases, and some fields even have no ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/53C12N9/02C12N15/82A01H5/00A01H6/46
Inventor 刘清朱小源刘斌张少红杨梯丰董景芳
Owner RICE RES INST GUANGDONG ACADEMY OF AGRI SCI
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