CN105755156A - Specific primer of Aeromonas salmonicida and application thereof to turbot culture process - Google Patents
Specific primer of Aeromonas salmonicida and application thereof to turbot culture process Download PDFInfo
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- CN105755156A CN105755156A CN201610307673.0A CN201610307673A CN105755156A CN 105755156 A CN105755156 A CN 105755156A CN 201610307673 A CN201610307673 A CN 201610307673A CN 105755156 A CN105755156 A CN 105755156A
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Abstract
The invention relates to a specific primer of Aeromonas salmonicida and an application of the specific primer to a turbot culture process. The specific primer of Aeromonas salmonicida designed by the invention comprises an upstream primer F: GGGCTCGCTATGACCAGTAT and a downstream primer R: GAGTGACCTTGAGCTTGACG, and can effectively distinguish Aeromonas salmonicida from common pathogenic strains, thereby showing strong specificity and sensitivity. A PCR detection method of Aeromonas salmonicida in the turbot culture process provided by the invention is adopted, so that the detection of Aeromonas salmonicida in the culture process is more convenient. The establishment of the detection method of the invention provides a necessary theoretical basis and a perfect method system for detection and analysis of high-incidence pathogenic bacteria in the turbot culture process in future and lays a foundation for the large-scale and healthy development of Chinese aquaculture industry.
Description
Technical field
The invention belongs to the pathogenic microorganism examination field, be specifically related to pathogenic bacterium common in a kind of turbot breeding process: the PCR detection method of aeromonas salmonicida (Aeromonassalmonicida).
Background technology
The turbot having the title of " many precious fishes " has been introduced into China up to 10 years as long as, by the seed that it is excellent, advanced innovation mode and the trend of industrialized aquaculture, is increasingly becoming the noticeable important industry of breeding fish in the whole nation.The development of this brand-new industry, pulls the Aquatic product economy of China and all has great role, and has established the theory and practice basis of richness for the longitudinal development of northern China coastal cities industrialized fish culture.However as the quick growth of cultivation scale, the increase of cultivation density, and the deterioration of water body environment, a series of disease is also following.In turbot breeding process, the sharply outburst of bacterial disease has a strong impact on and constrains the sound development of China's turbot aquaculture industry in recent years, brings huge economic loss to raiser.
Summary of the invention
It is an object of the invention to provide and a kind of aeromonas salmonicida is had high specificity and the high specific primer of susceptiveness.
It is a further object of the present invention to provide a kind of in turbot breeding process, can Rapid identification etiology, for the PCR detection method of aeromonas salmonicida in the turbot breeding process that raiser retrieves economic losses.
The technical solution used in the present invention is: a kind of aeromonas salmonicida specific primer, described aeromonas salmonicida specific primer is made up of forward primer F and downstream primer R；
The sequence of described forward primer F is: GGGCTCGCTATGACCAGTAT；
The sequence of described downstream primer R is: GAGTGACCTTGAGCTTGACG.
Preferably, above-mentioned a kind of aeromonas salmonicida specific primer, described aeromonas salmonicida is Aeromonassalmonicida.
The PCR detection method of aeromonas salmonicida in a kind of turbot breeding process, method is as follows:
1) STb gene of turbot lesions position antibacterial is extracted；
2) with the DNA that extracts for template, adopt above-mentioned aeromonas salmonicida specific primer, carry out pcr amplification；
3) the agarose gel imaging result according to pcr amplification product judges whether turbot is infected by aeromonas salmonicida；Have 708bp band to produce if agarose gel presents result, then turbot is infected by aeromonas salmonicida, otherwise not infected.
The PCR detection method of aeromonas salmonicida in above-mentioned a kind of turbot breeding process:
PCR reaction condition: first stage: 94 DEG C of 1min；
Second stage: 94 DEG C of 30s, 60 DEG C of 1min, 72 DEG C of 30s；30 circulations；
Phase III: 72 DEG C of 2min；
Fourth stage: 4 DEG C of preservations.
The invention has the beneficial effects as follows:
1. the present invention, the aeromonas salmonicida specific primer of design, effectively can distinguish aeromonas salmonicida from each common causative bacterial strain, show very strong specificity.
2. the present invention, the aeromonas salmonicida specific primer of design, susceptiveness is high, can effectively detect the aeromonas salmonicida in breeding process, and its minimal detectable concentration can reach 10-4ng/ul。
3. the present invention, the PCR detection method of aeromonas salmonicida in turbot breeding process provided so that in breeding process, the detection of aeromonas salmonicida is more easy.In turbot breeding process, once there be the risk infected by aeromonas salmonicida, namely can accomplish Rapid identification etiology, retrieving a large amount of loss for raiser.The detection method of the present invention can effectively detect the high-risk pathogenic bacterium aeromonas salmonicida in turbot breeding process, and this detection method high specificity of empirical tests is highly sensitive.The detection being asserted pathogenic bacterium occurred frequently in turbot breeding process from now on of this detection method and analysis provide the theoretical foundation of necessity and perfect method system; the sound development not being only turbot aquaculture industry from now on is made that contribution, simultaneously for promoting that the large-scale health development of China's aquaculture industry is laid a good foundation.
Accompanying drawing explanation
Fig. 1 is the PCR reaction condition optimization of aeromonas salmonicida specific primer Sa；
Wherein, M:MarkerDL2000,1-6: annealing temperature respectively 55,56,57,58,59,60 DEG C.
Fig. 2 is the specificity verification of aeromonas salmonicida specific primer Sa；
Wherein, 1.Aeromonasbivalvium；2.Aeromonascaviae；3-4.Aeromonashydrophila；
5.Aeromonasjandaei；6.Aeromonassalmonicida；7.Aeromonasschubertii；
8.Aeromonassobria；9.Aeromonasveronii；10.Pseudomonasaeruginosa；
11.Pseudomonasfragi；12.Pseudomonasgessardii；
13.Pseudomonashelmanticensis；14.Pseudomonaskilonensis；
15.Pseudomonasmarginalis；16.Vibrioalginolyticus；17.Vibriocyclitrophicus；
18.Vibriogigantis；M:MarkerDL2000.
Fig. 3 is being quick on the draw property of the PCR checking of aeromonas salmonicida specific primer Sa.
Wherein, M:MarkerDL2000,1-5: template concentrations respectively 100, 10-1, 10-2, 10-3, 10-4ng/ul。
Detailed description of the invention
The present invention will be further described by the following examples, but not thereby limiting the invention.
1 one kinds of aeromonas salmonicida specific primers of embodiment
(1) design of aeromonas salmonicida specific primer
The present embodiment is for the dnaJ gene of strain aeromonas salmonicida Aeromonassalmonicida, utilize MEGA6 software, designing and aeromonas salmonicida Aeromonassalmonicida has high specificity and the high a pair specific primer Sa of susceptiveness, the specifying information of this aeromonas salmonicida specific primer is as shown in table 1.
Table 1
(2) exploration of aeromonas salmonicida specific primer the best PCR reaction condition
1, the extraction of examination bacterial strain DNA is treated
Use Ezup post bordetella gene group DNA extraction agent box (antibacterial), extract the DNA of aeromonas salmonicida (Aeromonassalmonicida) strain, specifically comprise the following steps that
1.1) bacterium solution containing strain aeromonas salmonicida (Aeromonassalmonicida) of 1ml incubated overnight is taken, add in 1.5ml centrifuge tube, room temperature 8000rmp is centrifuged 1min, abandon supernatant, collect thalline, add 180ulBufferDigestion, add 20ulProteinaseK solution, concussion mixing.56 DEG C of water-bath 1h crack completely to cell.In water-bath process, reverse mixing in every 10 minutes once, promotes lysis.
1.2) 200ulBufferBD is added, fully reverse mixing.Add after BufferBD, produce if any precipitation, can 70 DEG C of water-baths 10 minutes.
1.3) dehydrated alcohol of 200ul is added, fully reverse mixing.It is likely to after adding dehydrated alcohol produce translucent fibre shape float, does not affect extraction and the application of DNA.
1.4) adsorption column is put in collecting pipe, with pipettor by step 1.3) solution that obtains and translucent fibre shape float all add in adsorption column, stand 2min, at the centrifugal 1min of 12000rmp room temperature, outwell the waste liquid in collecting pipe.
1.5) adsorption column is placed back in collecting pipe, add the centrifugal 30s of 500ulPWSolution, 10000rmp, outwell filtrate.
1.6) adsorption column is placed back in collecting pipe, add the centrifugal 30s of 500ulWashSolution, 10000rmp, outwell filtrate.
1.7) adsorption column is placed back in collecting pipe, in the centrifugal 2min of 12000rmp room temperature, discard the WashSolution of residual.Adsorption column being opened lid and places several minutes in room temperature, the residual thoroughly to dry the WashSolution, the WashSolution that remain in adsorbing material can affect the yield of genomic DNA and follow-up experiment.
1.8) take out adsorption column, put in a new 1.5ml centrifuge tube, add 50-100ulCEBuffer and stand the centrifugal 2min of 3min, 12000rmp room temperature, collect DNA solution, be the DNA of aeromonas salmonicida (Aeromonassalmonicida).The DNA extracted can carry out next step experiment or-20 DEG C of preservations immediately.
2, the exploration of aeromonas salmonicida specific primer optimum annealing temperature
Pcr amplification is done for template with the DNA of aeromonas salmonicida, and the annealing region of purpose primer is respectively set to 55-60 DEG C, pcr amplification product is electrophoresis in 2% agarose 1 × TAE buffer system, every hole application of sample 5ul, observe and photographic recording with gel imaging system, determine each primer optimum annealing temperature according to the Gel electrophoresis results after PCR.Concrete PCR reaction condition and system are as shown in table 2, and result is Fig. 1 such as.
Primer the best PCR of table 2 order reacts exploration condition
As seen from Figure 1, the specific binding of this primer is had relatively larger impact by temperature, and temperature is more high more is beneficial to that it is specific binding, when annealing temperature reaches 60 DEG C, its specific amplification band brightness and definition reach the best, therefore determine that optimum annealing temperature is 60 DEG C.
(3) specificity of aeromonas salmonicida specific primer is explored
1, the extraction of examination bacterial strain DNA is treated
Use Ezup post bordetella gene group DNA extraction agent box (antibacterial), extract the DNA of different strain as shown in table 3 respectively, step 1 during concrete steps are such as above-mentioned (two).
2, specificity is explored
Respectively with in table 3, the DNA of different strain is that template does pcr amplification, concrete PCR reaction condition and system as shown in table 4, and the Gel electrophoresis results after PCR is as shown in Figure 2.
Table 3 treats that examination bacterial strain is as follows:
Primer the best PCR reaction condition of table 4 order
From Figure 2 it can be seen that this specific primer is in Aeromonas, and all show very strong specificity in pseudomonas and vibrio, specific amplification can only be produced with purpose bacterial strain aeromonas salmonicida, and not produce specific amplification with non-purpose bacterial strain.Therefore it shows very strong specificity as seen.
(4) exploration of the susceptiveness of aeromonas salmonicida specific primer
1, the extraction of examination bacterial strain DNA is treated
Use Ezup post bordetella gene group DNA extraction agent box (antibacterial), extract the DNA of aeromonas salmonicida (Aeromonassalmonicida) strain, step 1 during concrete steps are such as above-mentioned (two).
2, the exploration of susceptiveness
The DNA concentration of aeromonas salmonicida is adjusted to 10ng/ul, and dilution is 10 successively0、10-1、10-2、10-3、10- 4Ng/ul, takes 2ulDNA as shown in table 5 as PCR reaction template, concrete PCR reaction condition and system respectively, and the Gel electrophoresis results after PCR is as shown in Figure 3.
Primer the best PCR of table 5 order reacts exploration condition
As seen from Figure 3, this primer is 10 at aeromonas salmonicida DNA concentration0、10-1、10-2、10-3、10-4All can producing specific amplification during ng/ul, its minimal detectable concentration can reach 10-4ng/ul。
The PCR detection method of aeromonas salmonicida in 2 one kinds of turbot breeding process of embodiment
Method is as follows:
1, the STb gene of turbot lesions position antibacterial is extracted；
Its affected area tissue 1ml sterilized water is rinsed repeatedly, at least three times, then collect liquid, use Ezup post bordetella gene group DNA extraction agent box (antibacterial), extract the STb gene of turbot lesions position antibacterial, the step 1 of (two) in concrete steps such as examples detailed above 1.
2, with DNA for template, adopt the aeromonas salmonicida specific primer described in embodiment 1, utilize PCR method to expand, obtain PCR primer；
Forward primer F:GGGCTCGCTATGACCAGTAT
Downstream primer R:GAGTGACCTTGAGCTTGACG
PCR reaction condition: first stage: 94 DEG C of 1min；
Second stage: 94 DEG C of 30s, 60 DEG C of 1min, 72 DEG C of 30s；30 circulations；
Phase III: 72 DEG C of 2min；
Fourth stage: 4 DEG C of preservations.
3, pcr amplification product electrophoresis in 2% agarose 1 × TAE buffer system, every hole application of sample 5ul, observes and photographic recording with gel imaging system.
4, criterion: judge whether turbot is infected by aeromonas salmonicida according to the agarose gel imaging result of pcr amplification product；Have 708bp band to produce if agarose gel presents result, then turbot is infected by aeromonas salmonicida, otherwise not infected.
Making the turbot model infecting aeromonas salmonicida, then this specific primer is repeatedly tested, it is high that test result shows to use this primer to carry out aeromonas salmonicida result accuracy；The 21 tail turbot verification and measurement ratios wherein infecting aeromonas salmonicida are 100%, the non-recall rate being uninfected by killing salmon gas unit cell 12 tail turbot just is also 100%, in sum, this specific primer can accurately detect and just kill salmon gas unit cell, and testing result rate of accuracy reached is to 100%.
Claims (5)
1. an aeromonas salmonicida specific primer, it is characterised in that: described aeromonas salmonicida specific primer is made up of forward primer F and downstream primer R；
The sequence of described forward primer F is: GGGCTCGCTATGACCAGTAT；
The sequence of described downstream primer R is: GAGTGACCTTGAGCTTGACG.
2. a kind of aeromonas salmonicida specific primer according to claim 1, it is characterised in that: described aeromonas salmonicida is Aeromonassalmonicida.
3. the application in turbot breeding process of the aeromonas salmonicida specific primer described in claim 1 or 2.
4. the PCR detection method of aeromonas salmonicida in a turbot breeding process, it is characterised in that method is as follows:
1) STb gene of turbot lesions position antibacterial is extracted；
2) with the DNA that extracts for template, adopt the aeromonas salmonicida specific primer described in claim 1 or 2, carry out pcr amplification；
3) the agarose gel imaging result according to pcr amplification product judges whether turbot is infected by aeromonas salmonicida；Have 708bp band to produce if agarose gel presents result, then turbot is infected by aeromonas salmonicida, otherwise not infected.
5. the PCR detection method of aeromonas salmonicida in a kind of turbot breeding process according to claim 4, it is characterised in that:
PCR reaction condition: first stage: 94 DEG C of 1min；
Second stage: 94 DEG C of 30s, 60 DEG C of 1min, 72 DEG C of 30s；30 circulations；
Phase III: 72 DEG C of 2min；
Fourth stage: 4 DEG C of preservations.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106520962A (en) * | 2016-11-17 | 2017-03-22 | 中国水产科学研究院黑龙江水产研究所 | Aeromonas salmonicida SYBR Green I real-time quantitive PCR (Polymerase Chain Reaction) detection method and application thereof |
| CN106868129A (en) * | 2017-02-22 | 2017-06-20 | 辽宁大学 | A kind of Maxwell vibrios specific primer and the application in Maxwell vibrios in detection aquiculture animal body |
Citations (1)
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| CN102869785A (en) * | 2010-08-03 | 2013-01-09 | 中国水产科学研究院黄海水产研究所 | Gene chips for detecting multiple pathogenic bacteria in animals cultivated in sea water and uses thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102869785A (en) * | 2010-08-03 | 2013-01-09 | 中国水产科学研究院黄海水产研究所 | Gene chips for detecting multiple pathogenic bacteria in animals cultivated in sea water and uses thereof |
Non-Patent Citations (2)
| Title |
|---|
| PHAM HONG NHUNG: "Use of the novel phylogenetic marker dnaJ and DNA–DNA hybridization to clarify interrelationships within the genus Aeromonas", 《INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY》 * |
| 吕俊超: "养殖大菱鲆病原菌——杀鲑气单胞菌无色亚种的分离鉴定和组织病理学研究", 《中国海洋大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106520962A (en) * | 2016-11-17 | 2017-03-22 | 中国水产科学研究院黑龙江水产研究所 | Aeromonas salmonicida SYBR Green I real-time quantitive PCR (Polymerase Chain Reaction) detection method and application thereof |
| CN106520962B (en) * | 2016-11-17 | 2019-11-01 | 中国水产科学研究院黑龙江水产研究所 | The SYBR Green I real-time quantitative PCR detection method of aeromonas salmonicida and its application |
| CN106868129A (en) * | 2017-02-22 | 2017-06-20 | 辽宁大学 | A kind of Maxwell vibrios specific primer and the application in Maxwell vibrios in detection aquiculture animal body |
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Application publication date: 20160713 |