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Two gRNA sequences simultaneously targeting genes xa13 and xa25 and efficiently creating resistance to bacterial blight rice

A technology of bacterial blight and homologous sequences, applied in the field of genetic genetics and breeding, can solve problems such as lack of research reports, and achieve the effects of low cost, broad resistance spectrum and high efficiency

Active Publication Date: 2020-11-20
BIOLOGICAL TECH INST OF FUJIAN ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of crop resistance, the earliest report is to use TALEN genome editing technology to target the Os11N3 gene to create resistant materials, and broad-spectrum resistant materials are generally obtained through multiple gRNA-mediated multi-gene editing. no research report

Method used

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  • Two gRNA sequences simultaneously targeting genes xa13 and xa25 and efficiently creating resistance to bacterial blight rice
  • Two gRNA sequences simultaneously targeting genes xa13 and xa25 and efficiently creating resistance to bacterial blight rice
  • Two gRNA sequences simultaneously targeting genes xa13 and xa25 and efficiently creating resistance to bacterial blight rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: gRNA2-mediated improvement of Yuxiang Youzhan to create a new improved material with broad spectrum and high resistance to bacterial blight

[0029] (A) Sequence analysis of rice xa13 and xa25 genes and construction of targeting vectors

[0030] Use gene-specific primers 13-f: TTAATAACCTTCATCACCAGTAGC / 13-r: CTGTCGTCGTCGAGATCAGT; 25-f: ATTACCCCCCTTTTAGCACA / 25-r: TGCAAGCACGCGTTGACC to amplify rice xa13 and xa25 gene sequences gene sequences such as sequences SEQ ID NO.8, SEQ ID NO .9 shown. Sequence analysis showed that the xa13 gene contained 5 exons, and the xa25 gene contained 6 exons, including a complete expression frame, indicating that the gene functions normally and meets the conditions for further editing. And there is no base difference in the homologous sequence 5'-TCGGTGCCGTACGTGGTGGAGC-3' of the above two genes, so we chose the gRNA2 provided above to construct it into the cas9 expression vector, and the vector used was the artificially synthe...

Embodiment 2

[0042] Example 2: gRNA2-mediated improvement of five-spice silk seedlings to create new improved materials with broad-spectrum and high resistance to bacterial blight

[0043] Target gRNA2 to create a new improved material with broad-spectrum and high resistance to bacterial blight of spiced silk seedlings. The operation method and detection method are the same as in Example 1. The gene sequence of the gene sequence is obtained by amplifying and detecting the xa13 and xa25 target genes of the wild-type material of spiced silk seedlings As shown in the sequences SEQ ID NO.8 and SEQ ID NO.9, the expression frame is complete and the function is normal, which can be used as the editing target material. The operation method is the same as in Example 1. We obtained 33 positive plants from the five-spice silk seedling material, of which 27 clones had the mutation of the target gene, and the other 16 were double-gene mutations of xa13 and xa25, and the double mutation rate reached abou...

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Abstract

The invention discloses a base sequence 5'-TCGGTGCCGTACGTGGTGGCGCTCTTCAGC-3' of 30bp in length. The sequence is a long homologous sequence unique to rice bacterial blight infected genes xa13 and xa25,and the sequence is utilized to disclose two gRNAs capable of knocking out xa13 and xa25 infected genes in a targeted manner at the same time. Broad-spectrum rice new materials with double gene mutation and highly resistant to bacterial blight can be screened and obtained by utilizing the gRNAs, an efficient breeding mode is provided for creating broad-spectrum lasting disease-resistant materials, and the sequence is of important significance in studying prevention and control of rice bacterial blight.

Description

technical field [0001] The invention relates to the field of gene genetic breeding, in particular to a method for efficiently creating bacterial blight-resistant rice. Background technique [0002] Rice bacterial blight (Bacterial Blight, BB ) is one of the most harmful bacterial diseases in rice production. It is caused by the gram-negative bacteria Xanthomona soryzae pv. oryzae , Xoo. It usually invades rice from stomata or wounds, spreads along the vascular bundles and spreads to the whole plant, and finally produces off-white lesions on the leaves. The disease affects the photosynthesis of the plants, and the yield decreases by 10%-20% in mild cases, and 30% in severe cases. 50%. In addition, generally planted rice restorer lines contain only a single resistance gene. This makes the resistance spectrum of rice to bacterial blight limited, and it is difficult to cope with the continuous renewal and mutation of bacterial blight. It can be seen that the creation of broad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/113C12N15/82A01H5/00A01H6/46
CPCC12N15/113C12N15/8213C12N15/8281C12N2310/10
Inventor 王锋朱义旺林雅容陈建民周军爱梅法庭陈睿郭新睿
Owner BIOLOGICAL TECH INST OF FUJIAN ACADEMY OF AGRI SCI
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