Planthopper lethal gene segment

A technology of gene fragments and planthoppers, applied in the field of agricultural biology, can solve the problems of poor chemical control effect and environmental pollution, achieve significant lethal effect, low synthesis cost, and facilitate large-scale application

Active Publication Date: 2019-02-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In my country, the continuous single long-term use of chemical agents has led to varying degrees of resistance of the planthopper to various pesticides. It is necessary to continuously increase the amount of pesticides used to achieve satisfactory

Method used

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  • Planthopper lethal gene segment
  • Planthopper lethal gene segment
  • Planthopper lethal gene segment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Cloning method of ubiquitin-conjugating enzyme morgue gene fragment:

[0037] (1) Get 10-20 heads of SBPH, and use the TRIzol method to extract total RNA;

[0038] (2) Synthesizing the first strand of cDNA;

[0039] (3) Obtain the gene fragment sequence from the SBPH transcriptome, in http: / / www.ncbi.nlm.nih.gov / After the homology comparison, it was predicted to be the ubiquitin-conjugating enzyme morgue gene of SBPH, and P 1 and P 2 were designed using Primer premier 5.0 software, and amplified by RT-PCR;

[0040] Upstream primer (P1): 5'ATTGGATCTCAACCGCC 3' (SEQ ID NO.2),

[0041] Downstream primer (P 2): 5'GCATATTTCCACGTCCA 3' (SEQ ID NO.3);

[0042] PCR conditions are: denaturation at 94°C for 2min, 30sec at 94°C, 30sec at 55°C, 30sec at 72°C, 35 cycles, extension at 72°C

[0043] PCR reaction system (50μL):

[0044]

[0045] (4) The PCR product is separated by agarose gel electrophoresis, and the target DNA fragment is recovered;

[0046] (5) Insert the ...

Embodiment 2

[0050] Embodiment 2.dsRNA synthesis and recovery

[0051] (1) According to the sequence of the verified ubiquitin-conjugating enzyme morgue gene fragment, P 3 and P 4 were designed using Primer Premier 5.0 software;

[0052] Upstream primer (P3): 5'TAATACGACTCACTATAGGGATTGGCAAGCAACTATAA 3'(SEQ ID NO.5)

[0053] Downstream primer (P4): 5'TAATACGACTCACTATAGGGAGCTCTGGCGATGTCTTC 3'(SEQ ID NO.6)

[0054]

[0055] PCR conditions: Denaturation at 94°C for 2min, 30sec at 94°C, 30sec at 60°C, 30sec at 72°C, 38 cycles, extension at 72°C.

[0056] (2) The PCR product was separated by electrophoresis on a 1% low-melting point agarose gel and observed under ultraviolet light. The sequence is shown in SEQ ID NO.4.

[0057] (3) Using Promega's SV Gel and PCR Clean-Up System kit for recovery:

[0058] ① Cut the gel of the separated target fragment, put it into a 1.5ml microcentrifuge tube that has been weighed in (a), weigh (b) again, and calculate the weight of the cut gel in b-a;

...

Embodiment 3

[0068] Example 3 Planthopper feeding dsRNA experiment

[0069] (1) Seal one end of the glass tube with a parafilm, absorb second-instar planthoppers (BPH, BPH) into different glass tubes with an insect sucker, and seal the other end with gauze;

[0070] (2) Gently pat the insects to one end with your hands, remove the gauze from the other end, and put the prepared parafilm sticker face up, pull evenly to both sides, pull it into a square, and then cover it on the glass On the nozzle of the tube, place the tube upright on the ultra-clean table;

[0071] (3) Use a pipette to draw 100 μl of feed and drop it in the center of the parafilm. The control only adds feed (see Table 2 for formula), and the treatment group adds dsRNA of ubiquitin-conjugating enzyme morgue gene in the feed, and the dsRNA concentration is 2300ng / μl. Use a new parafilm, with the sticker side facing down, on the opening of the glass tube, and seal the feed and dsRNA between the two layers of parafilm;

[00...

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Abstract

The invention discloses a planthopper lethal gene segment. The planthopper lethal gene segment ubiquitin-conjugating enzyme morgue capable of leading to planthopper death after interference and with the sequence shown as SEQ ID NO.1 is screened out. When dsRNA of the gene segment is utilized and fed to small brown rice planthoppers and brown planthoppers, the death of the small brown rice planthoppers and brown planthoppers can be effectively caused. The planthopper lethal gene segment disclosed by the invention is safety to environment, ecology and food, and a novel path is provided for utilizing an RNA interference technology to control injurious insects.

Description

technical field [0001] The invention belongs to the field of agricultural biotechnology and relates to a planthopper lethal gene fragment. Background technique [0002] In my country, the continuous single long-term use of chemical agents has led to varying degrees of resistance of the planthopper to various pesticides. It is necessary to continuously increase the amount of pesticides used to achieve satisfactory control effects, resulting in more serious environmental pollution. vicious circle. In addition, the rice stripe leaf blight caused by the stripe virus transmitted by the striatellus striatellus is poorly controlled by pesticides after the onset, so we can only rely on pest control to prevent disease. Therefore, in the practice of agricultural production, there is an urgent need for alternative control methods other than chemical pesticides. [0003] RNA interference (RNA interference, RNAi) is a gene silencing phenomenon mediated by double-stranded RNA. The double...

Claims

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Application Information

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IPC IPC(8): C12N15/12C12N15/11C12N15/113C12N15/10A01N37/46A01P7/04
CPCA01N37/46C07K14/43563C12N15/10C12N15/11C12N15/113C12N2310/141
Inventor 王亚琴王书平李飞贺康肖花美胡涛
Owner ZHEJIANG UNIV
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