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Real-time fluorescence PCR detection method and kit for eucalyptus components

A real-time fluorescence and reagent kit technology, applied in the field of PCR detection, can solve the problems of unsatisfactory demand, high price, and inability to effectively distinguish mixed honey

Active Publication Date: 2017-06-09
SHANGHAI ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional detection methods can no longer meet the needs of production practice and application
Although modern analysis technology has great advantages and development space in the identification of honey adulteration, it is expensive, and due to the complexity of different honey varieties, the vastly different sources of origin, and the influence of factors such as harvesting seasons, storage, and processing, making The detection has great uncertainty, and it cannot effectively distinguish between mixed honey and single honey, and low-priced honey mixed with high-priced honey
Moreover, more technologies are currently in the stage of laboratory research, and the practicability is not high, and they cannot be promoted in all aspects.

Method used

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  • Real-time fluorescence PCR detection method and kit for eucalyptus components
  • Real-time fluorescence PCR detection method and kit for eucalyptus components
  • Real-time fluorescence PCR detection method and kit for eucalyptus components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1. Determination of target sequence for eucalyptus detection and primer probe design

[0060] Based on the characteristics of the eucalyptus genome and comprehensive analysis of the genomic characteristics of other species closely related to eucalyptus, the inventors determined that the ribosomal protein L16 gene of eucalyptus was used as the specific gene and the specific gene was Design detection primers and probes to analyze the specificity and accuracy of the detection results at multiple specific sites.

[0061] After repeated testing and verification, the inventors determined that the target sequence and specific primer probes for the nectar plant Eucalyptus component detection are as follows:

[0062] F: 5'-ATTGTAGCAACTGAAATCTTTCCTA-3' (SEQ ID NO:1);

[0063] R: 5'-GTATTGATGCTTTATTACACTGCCT-3' (SEQ ID NO: 2);

[0064] P1: 5'-FAM-ATGCAGATAAAGGGAAGGTTGAGAGAA-BHQ1-3' (SEQ ID NO: 3);

[0065] P1: 5'-FAM-TGCAGATGGAGGGAAGGTTGAGAGAA-BHQ1-3' (SEQ ID NO: 4).

[0066] The inv...

Embodiment 2

[0067] Example 2. Universal screening of reference primer probes for real-time fluorescent PCR of nectar plants

[0068] The real-time fluorescence reaction system used is:

[0069]

[0070] Place the mixture reaction tube in the real-time fluorescent PCR machine 7500, the procedure is as follows:

[0071] 50℃ 2min;

[0072] Pre-denaturation at 95°C for 10 minutes;

[0073] 95°C for 15s, 60°C for 1min, a total of 40 cycles;

[0074] The threshold is set to automatic when generating the image.

[0075] When testing for generality, use flowering plants (48 species): acacia, rape, milk vetch, wolfberry, wattle, lychee, longan, eucalyptus grandis, jujube, linden, sunflower, rose, cotton, manuka, apple , Lavender, orange, sweet potato, cabbage, sesame, cucumber, rice, wheat, mulberry, broad bean, wintergreen, magnolia, olive, osmanthus, ginseng, taro, locust tree, sweet potato, camellia, tulip, kiwi, mango, grape, strawberry, Lily, chrysanthemum, rhododendron, chestnut, elm, tomato, poplar, ...

Embodiment 3

[0085] Example 3. Establishment of real-time fluorescent PCR system for eucalyptus honey

[0086] 1. Eucalyptus honey real-time fluorescent PCR reaction system

[0087] The real-time fluorescent PCR reaction system for eucalyptus components is shown in Table 1. Place the mixture reaction tube in the real-time fluorescent PCR machine AB ViiA7.

[0088] The PCR program is as follows:

[0089] 50℃ 2min;

[0090] Pre-denaturation at 95°C for 10 minutes;

[0091] 95℃ for 15s, 60℃ for 1min, 40 cycles.

[0092] The threshold is set to automatic when generating the image.

[0093] The PCR reaction system is shown in Table 1.

[0094] Table 1. Real-time fluorescent PCR reaction system

[0095]

[0096] 2. Eucalyptus primer specificity experiment

[0097] With the above-mentioned real-time fluorescence reaction system and procedures for specific detection, 7 eucalyptus species: Eucalyptus citriodora Hook.f., Eucalyptus globulus Labill., Eucalyptus grandis Hill ex Maiden, and straight DNA of Eucalyptu...

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Abstract

The invention relates to a real-time fluorescence PCR detection method and kit for eucalyptus components. The invention discloses a primer capable of specifically identifying the eucalyptus components. The primer can generate specific amplification aiming at DNA containing the eucalyptus components and does not generate specific amplification aiming at DNA which does not contain the eucalyptus components. The invention further provides a simplified PCR detection method which can be well applied to identification of the eucalyptus components and is good in reproducibility and sensitivity.

Description

Technical field [0001] The invention belongs to the field of PCR detection. More specifically, the invention relates to a real-time fluorescent PCR detection method for eucalyptus components and a kit thereof. Background technique [0002] Honey is a natural sweet substance that bees collect nectar, secretions or honeydew from plants, mix with their own secretions, and fully brew them. The world's total annual honey production is about 1.3 million tons. The distribution of production is as follows: Europe accounts for 23%, North America accounts for 16%, South America accounts for 10%, Asia accounts for 37%, and Oceania accounts for 2%. China is the world's largest producer and exporter of honey, with a total annual output of between 300,000 and 400,000 tons of honey, and a total annual output value of around RMB 8 billion. Statistics from the China Bee Products Association in 2013 show that China's annual honey exports have remained at around 100,000 tons in recent years. In 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/68C12N15/11
CPCC12Q1/686C12Q1/6895C12Q2561/101C12Q2561/113C12Q2545/101
Inventor 李想李辉高琴刘博任怡菲门光琦
Owner SHANGHAI ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C