Research Article | | Peer-Reviewed

A Fast, Simple and Low-cost DNA Extraction Protocol from Common Ants and Beetles for Multiple Molecular Applications

Received: 14 April 2024     Accepted: 27 April 2024     Published: 17 May 2024
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Abstract

The rapid development of molecular biology tools in insect systematics, invasion research, evolutionary ecology and biodiversity analysis has led to faster and greater progress in understanding insect behavior and biology. Efficient DNA extraction is the foremost step and serves as the vital foundation. Several rapid DNA extraction methods have been established, which are often time-consuming and labour-intensive. Here, a simple, fast, low-cost DNA extraction protocol for common insect samples was developed basing on 28 specimens of 16 insect species (7 ants, 9 bark and ambrosia beetles). The new protocol was shown to be feasible and highly efficient by comparison with commercial kit in terms of DNA yield, purity and PCR sensitivity. The concentration of DNA through the new rapid method was higher than that through commercial kit, whether in ant or beetle samples. A better quality of DNA extracted via kit was indicated by A260/A280 mostly ranging from 1.80 to 2.00. There was little difference between DNA extracted from adult and nymphal insects. PCR sensitivity of extracted DNA using both protocols was comparable. For nested PCR, amplification after two rounds yielded a bright signal using template DNA through both methods. But for PCR using primers of LCO1490 and HCO2198, the success ratio was lower (85.18%). Through BLAST, these amplicons were matched to related data with high identity. By combining this protocol with variable analysis platforms such as common PCR, loop-mediated isothermal amplification, and high throughput sequencing, it could assist insect diagnostics, biological surveys and invasion researches.

Published in American Journal of Bioscience and Bioengineering (Volume 12, Issue 3)
DOI 10.11648/j.bio.20241203.12
Page(s) 48-55
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

DNA Extraction, Insects, Molecular Analysis, Rapid, Simple, Low-Cost

1. Introduction
The application of molecular biology tools in insect systematics, invasion research, evolutionary ecology and biodiversity analysis has accelerated in recent years, resulting in faster and greater progress in understanding insect behavior and biology . Timely tracking methods are essential for monitoring insect population dynamics. Among current tracing approaches, molecular methods play an important role . DNA barcoding system for taxonomic identification is based on the assumption that sequence conservation is normally much higher intraspecifically than interspecifically . Plant-insect molecular interaction, including plant defense signal production, insect elicitor perception and effector secretion for efficient infection, remains a perennial issue . Taking advantage of high-throughput sequencing platforms, many insect genome maps have been drawn . Expansion or contraction of specific gene family revealed by comparative analysis can be the underlying reason for changes in insect biology and social behavior . Insecticide resistance caused by overuse of chemicals has weakened pest management programs and remains one of the most popular topics for researchers . Above all, DNA sequences with the encoded genetic information are the central component of molecular biological techniques.
DNA extraction from insect materials is essential and fundamental for molecular biology tools, with the central focus on DNA recovery in high quantity and quality. Several commonly used protocols include Chelex extraction, conventional extraction using CTAB, and commercial kits based on solid phase extraction . However, most of them are not cost effective, time consuming and labour intensive. Currently, the research purpose is to reduce operating time, labour and cost without compromising DNA quantity and quality too much . A fast, simple and low cost extraction approach with sufficient yield and purity of DNA would greatly improve the overall efficiency of molecular analysis.
Insects pose a significant threat to agriculture, forestry and horticulture all over the world. The international transfer of non-native insects is a serious challenge to local ecosystems . Non-native insects are considered invasive and are subject to strict embargoes as international trade increases . Ants are typical members on invader list with strong destructive capabilities across the world. Invasive ants can alter the local ecosystem and greatly reduce native biodiversity . It has been reported that the economic loss associated with ant invaders since 1930 amounts to US$51.93 billion, of which 92% are damages mainly to agriculture and social welfare . Bark and ambrosia beetles, which spend most of their life cycle in wood, are abundant in forests. Some of them can kill millions of trees in Europe, North America and Asia, each year with a random breakout. Unfortunately, they are often transmitted in packaging and wood products . Rapid screening and accurate diagnosis of these invaders is important for monitoring, decision making and supporting system.
In this study, a fast, simple and low-cost DNA extraction protocol was established with sufficient nucleic acid quantity and quality for further molecular analysis such as DNA barcoding etc. This protocol is believed to improve diagnostic efficiency and do favor to multiple molecular processes.
2. Materials & Methods
2.1. Insect Specimens
A total of 28 specimens of 16 insect species were collected and used in this study, including 7 species of ants and 9 species of bark and ambrosia beetles. Some of them were reserved samples, the others were donated by other labs. These samples were stored in pure ethanol/dry condition for different periods of time (Table 1). Six samples of Hylurgus ligniperda were collected from Pinus spp..
Table 1. Sample list.

No.

Species

Collection Time

Storage

Origin

Host

1

Messor barbarus

2023.10

Ethanol

reserved sample

/

2

Pogonomyrmex barbatus

2023.10

Ethanol

reserved sample

/

3

Atta mexicana

2023.10

Ethanol

reserved sample

/

4

Ectatomma opaciventre

2023.10

Ethanol

reserved sample

/

5

Wasmannia auropunctata

2023.1

Ethanol

Donated by Guangzhou Customs

/

6

Solenopsis geminata

2023.7

Dry condition

reserved sample

/

7

S. geminata

2014.5

Dry condition

reserved sample

/

8

S. geminata

2019.6

Dry condition

reserved sample

/

9

S. geminata

2016.6

Dry condition

reserved sample

/

10

S. invicta

2021.7

Ethanol

reserved sample

/

11

S. invicta

2023.6

Ethanol

Donated by Guangzhou Customs

/

12

Solenopsis sp.

2019.4

Dry condition

reserved sample

/

13

Solenopsis sp.

2019.10

Dry condition

reserved sample

/

14

Hylurgus ligniperda

/

Ethanol

reserved sample

Pinus radiata

15

H. ligniperda

2011.5

Dry condition

reserved sample

/

16

H. ligniperda

2014.1

Dry condition

reserved sample

P. radiata

17

H. ligniperda

2014.10

Dry condition

reserved sample

P. sylvestris

18

H. ligniperda

2019

Ethanol

reserved sample

/

19

H. ligniperda

2018.10

Ethanol

reserved sample

P. radiata

20

Xyleborus affinis

2020.10

Ethanol

Donated by Guangzhou Customs

/

21

X. perforans

2021.12

Ethanol

Donated by Guangzhou Customs

/

22

Ips. grandicollis

/

Ethanol

Donated by Nanjing Customs

/

23

I. sexdentatus

/

Ethanol

Donated by Nanjing Customs

/

24

Xylosandrus crassiusculus

2022.7

Ethanol

Donated by Guangzhou Customs

/

25

X. germanus

2023.6

Ethanol

Donated by Guangzhou Customs

/

26

X. germanus

2021.1

Ethanol

reserved sample

Pinus sp.

27

X. compactus

2020.6

Ethanol

Donated by Guangzhou Customs

/

28

Orthotomicus erosus

2023.3

Ethanol

Donated by Guangzhou Customs

/

2.2. Rapid DNA Extraction Using a New Protocol
A new rapid protocol was developed for DNA extraction from insect samples.
Solutions:
Extraction Buffer A: 0.2% (g/mL) NaOH solution.
Extraction Buffer B: 4.5% (v/v) Tween 20 solution.
The entire process involves following steps:
Sample crushing: 0.1-0.5 mg of each sample (intact body or fragments) was placed into a PCR tube (0.2 mL). Use a pipette tip to crush the insect material.
Adding buffers: 10 uL Buffer A and 2 uL Buffer B were added, mixed and centrifuged briefly.
Extraction: Heat the mixture to 95°C for 15 min. Add 10 μL ddH2O to make the final DNA solution.
2.3. DNA Extraction Using Commercial Kit
Total DNA was extracted from these samples using UE small amount genomic DNA preparation kit (UElandy Biotechnology Co., LTD, China) according to the manufacturer’s introduction. First, collect 0.5-1.0 mg of insect samples and place in a centrifuge tube (1.5 mL). Crush insect remains with a pipette tip. Second, add 350 uL PBS solution and 0.9 uL RNase A into the tube. Vortex for 15 s, and leave the mixture at room temperature for 1 min. Third, add 150 uL Buffer C-L and 8 uL Proteinase K. Vortex for 1 min, and centrifuge briefly. Heat the mixture to 56°C for 10 min. Fourth, add 350 uL Buffer P-D. Vortex for 30 s, and centrifuge at 12,000 r/min for 10 min. Fifth, transfer the supernatant to a DNA preparation tube (with the DNA adsorbent film). Centrifuge at 12,000 r/min for 1 min. Sixth, discard the filtrate and add 500 uL Buffer W1 into the DNA preparation tube. Centrifuge at 12,000 r/min for 1 min. Repeat the last step twice with 700 uL Buffer W2. Dissolve DNA with 100 uL eluent at room temperature for 5 min and centrifuge at 12,000 r/min for 1 min.
The yield and purity of final DNA solutions produced by two protocols above were tested using a Nanodrop 2000c spectrophotometer (Thermo Scientific, USA).
2.4. PCR Amplification of COI Loci
Two sets of primers were employed for amplification of COI regions. One is LCO 1490 (5’-GGTCAACAAATCATAAAGATATTGG-3’) and HCO 2198 (5’-TAAACTTCAGGG TGACCAAAAAATCA-3’) with an amplicon of ~710 bp. The other is nested primers, of which the external primers include CI-J-2183 (5’-CAACATTTATTTTTGATTTTGG-3’) and TL2-N-3014 (5’-TCCAATGCACTAATCTGCCATAT-3’) , and the internal primers consist of J2210 (5’-TCGCATATTATTAGGCAAGAAAGAG-3’) and N2739 (5’-AGAAATGTTGTGGGAAGAG-3’) . The first round of PCR produced a fragment of ~1300 bp, and the second produced a fragment of ~500 bp. The reaction mixture was in 50 µl volume consisting of 2 ul DNA solution, 1 ul each primer (20 µM), 25 ul reaction buffer (2×Es Taq MasterMix, CWBIO, China), and 21 ul ddH2O. Amplification was conducted on a GeneExplorer thermal cycler (BIOER Technology, China). Amplicons were sequenced by BGI Co., Ltd (Guangdong, China) and the result was analyzed using BLAST search tool (https://blast.ncbi.nlm.nih.gov/Blast.cgi?PROGRAM=blastn&PAGE_TYPE=BlastSearch&LINK_LOC=blasthome).
3. Results
3.1. Yield and Purity of Extracted DNA
The yield and purity of extracted DNA were analyzed using a Nanodrop 2000c spectrophotometer, and results varied depending on the protocol used. In general the concentration of DNA through the new rapid method was higher than that through commercial kit, whether in ant or beetle samples. A better quality of DNA extracted via kit was indicated by A260/A280 mostly ranging from 1.80 to 2.00. A low A260/A280 (<1.80) suggests protein contamination, while a high value (>2.00) points to RNA contamination. The A260/A280 of DNA extracted via the new rapid method was mostly below 1.80, suggesting protein contamination. There was little difference between DNA extracted from adult and nymphal insects.
In ants, the difference between DNA concentrations extracted through the new rapid method and the commercial kit could be as high as over 10 folds. The highest DNA concentration was observed in S. geminata using the new protocol. However, the purity of DNA was better using kit. For ants, only adult samples were tested.
For beetles, the concentration gap between two methods was similar to that for ants. The highest DNA concentration was recorded in X. crassiusculus using the new protocol. Little difference was observed between DNA concentrations from adult and nymphal insects.
Table 2. DNA extraction and amplification results.

No.

Species

Sample Condition

Protocol

Yield (ng/μL)

Purity A260/A280

Amplification

LCO1490+HCO2198

nested primers

1

M. barbarus

Fragments (adult)

UE

5.6

1.87

Fragments (adult)

AB

24.7

1.57

2

P. barbatus

Fragments (adult)

UE

6.2

1.72

Fragments (adult)

AB

34.7

1.61

3

A. mexicana

Fragments (adult)

UE

4.3

1.56

Fragments (adult)

AB

51.3

1.43

4

E. opaciventre

Fragments (adult)

UE

7.1

2.03

Fragments (adult)

AB

81.3

1.37

×

5

W. auropunctata

adult

UE

4.6

2.06

adult

AB

32.6

1.55

6

S. geminata

adult

UE

3.8

1.92

adult

AB

72.6

1.44

7

S. geminata

adult

UE

7.6

1.63

adult

AB

56.8

1.73

8

S. geminata

adult

UE

4.7

1.74

adult

AB

92.1

1.69

9

S. geminata

adult

UE

4.6

1.99

adult

AB

47.9

2.32

10

S. invicta

adult

UE

4.8

1.79

adult

AB

36.4

1.46

11

S. invicta

adult

UE

4.5

2.3

adult

AB

42.3

1.65

12

Solenopsis sp.

Fragments (adult)

UE

5.8

2.07

×

×

Fragments (adult)

AB

81.3

1.54

×

×

13

Solenopsis sp.

Fragments (adult)

UE

6.3

1.41

Fragments (adult)

AB

32.8

1.76

14

H. ligniperda

Fragments (adult)

UE

6

1.05

Fragments (adult)

AB

48.6

1.87

15

H. ligniperda

Fragments (adult)

UE

4.3

1.15

×

Fragments (adult)

AB

74.9

1.65

16

H. ligniperda

Fragments (adult)

UE

5.6

2.29

Fragments (adult)

AB

28.9

1.78

×

17

H. ligniperda

Fragments (nymph)

UE

6.1

1.88

Fragments (nymph)

AB

64.3

2.05

18

H. ligniperda

adult

UE

7.9

1.71

adult

AB

52.8

1.45

19

H. ligniperda

adult

UE

7.5

1.62

adult

AB

38.1

1.68

20

X. affinis

adult

UE

7.2

1.77

×

adult

AB

41.2

1.74

×

21

X. perforans

Fragments (adult)

UE

5.1

1.69

×

Fragments (adult)

AB

56.2

1.98

×

22

I. grandicollis

Fragments (adult)

UE

5.3

1.98

×

Fragments (adult)

AB

80.8

1.5

×

23

I. sexdentatus

Fragments (adult)

UE

4.7

2.11

Fragments (adult)

AB

91.5

1.36

24

X. crassiusculus

Fragments (adult)

UE

3.6

1.81

Fragments (adult)

AB

184.5

1.9

25

X. germanus

Fragments (adult)

UE

4.4

2.49

Fragments (adult)

AB

74

1.84

26

X. germanus

Fragments (adult)

UE

7.3

3.45

Fragments (adult)

AB

56.6

1.76

27

X. germanus

Fragments (adult)

UE

5.3

1.96

Fragments (adult)

AB

144.6

1.39

28

O. erosus

Fragments (adult)

UE

4.8

1.65

Fragments (adult)

AB

175.2

1.34

UE: UE small amount genomic DNA preparation kit;
AB: the new rapid protocol for DNA extraction.
×: amplification failed using specific primer set;
√: amplification successful using specific primer set.
3.2. Amplification of DNA Barcode
All the DNA solutions were further used as the templates to conform about corresponding quantity and quality, and to determine their suitability for routine molecular analysis. Results show that PCR sensitivity of extracted DNA using both protocols was comparable. For nested PCR, amplification after two rounds yielded a bright signal (amplicon near 500 bp) using template DNA through both methods. But for PCR using primers of LCO1490 and HCO2198, the success ratio was lower (85.18%). The first round of nested PCR could sometimes yield faint signals, mainly due to the sensitivity of electrophoresis. These PCR products were further sequenced to verify the accurate amplification. Through BLAST, these amplicons were matched to related data with high identity. Altogether, results above indicate that these two DNA extraction protocols were suitable for genetic analysis and species identification for insect samples.
4. Discussion
The molecular tools and corresponding working model have been deeply applied in researches on organisms, ecosystem and the big nature. First of all, DNA in good quantity and quality is the foundation. Several factors affect the efficiency of DNA extraction from different organisms, such as preservatives, temperature and humidity . For insects, ethanol and isopropanol are widely used preservatives . Ethanol solutions in the concentration ranging from 95% to 100% are the most effective for further molecular analysis, because ethanol could cross the cell membrane and inactivate enzymes including the DNase. It is also supposed to eliminate microorganisms present. Temperature is another vital factor influencing insect preservation. Ultralow temperature is often used for long-term preservation of insect specimens for genetic researches. Moisture can assist microbial growth and speed up specimen decay, so it needs to be get rid of so that microorganisms can be eliminated. In this study, 28 test specimens were used, which were stored either in pure ethanol or dry condition at room temperature. The oldest specimen was collected in 2018 and stored in pure ethanol. The DNA extracted through either protocols worked well in PCR amplification. Insect specimens dried at a high temperature and stored for a long time at room temperature could fail in DNA extraction due to DNA degradation.
Till now, there have been several methods for rapid extraction of DNA from insect samples . Many of them are time-consuming and labour-intensive because they involve steps for washing out impurities and contaminants. A simple and non-destructive DNA extraction procedure was reported earlier , and tested feasible for three arthropod orders: Coleoptera, Diptera and Hemiptera. Researchers also used Flinders Technology Associates Plant Saver cards which were originally designed for plant DNA extraction, in rapid DNA extraction from insect materials in non-lab situations and coupled with the loop-mediated isothermal amplification (LAMP) method to realize fast diagnosis . Sumit Jangra and colleagues evaluated and established a fast and zero-cost protocol for DNA extraction from small and soft-bodied insects for molecular applications . Commercial kits are always the most expensive among existing extraction procedures. Time, cost and labour involved in DNA extraction from insects need to be reduced on condition that the quantity and quality of DNA are sufficient for further molecular analysis. Low biomass and small size of insect specimens add more difficulties to DNA extraction.
Here, a simple, fast, and cost-effective insect DNA extraction protocol has been developed, which is sufficient for routine PCR based and other diagnostic applications. Through analysis, this protocol was shown to be suitable for ants and common beetles. The low yield of DNA through commercial kit may be led by the fact that DNA was either not absorbed onto the column or irreversibly bound. Repeated washing steps could also contribute to DNA loss. Similarly, the high amount of DNA through the rapid procedure could be facilitated by little DNA loss during the process. Besides, it has been observed that the quantity of DNA gradually declined over time regardless of extraction methods. The decrease in both quantity and quality was enhanced for DNA through the rapid protocol. The reason can be related to the presence of nucleases and ROS as impurities. Other impurities such as alkaloid and phenolics, also interfere with PCR amplification.
5. Conclusion
The rapid development of molecular biology tools in insect systematics, invasion research, evolutionary ecology and biodiversity analysis has led to faster and greater progress in understanding insect behavior and biology. Efficient DNA extraction is the foremost step and serves as the vital foundation. Several rapid DNA extraction methods have been established, which are often time-consuming and labour-intensive. Here, a simple, fast, low-cost DNA extraction protocol was established for common insect samples basing on 28 specimens of 16 insect species (7 ants, 9 bark and ambrosia beetles). The new protocol was shown to be feasible and highly efficient by comparison with commercial kit in terms of DNA yield, purity and PCR sensitivity. The concentration of DNA through the new rapid method was higher than that through commercial kit, whether in ant or beetle samples. A better quality of DNA extracted via kit was indicated by A260/A280 mostly ranging from 1.80 to 2.00. There was little difference between DNA extracted from adult and nymphal insects. PCR sensitivity of extracted DNA using both protocols was comparable. Through BLAST, these amplicons were matched to related data with high identity. By combining this protocol with variable analysis platforms such as common PCR, loop-mediated isothermal amplification, and high throughput sequencing, the efficiency of insect diagnostics, biological surveys and invasion researches is supposed to be largely improved.
6. Recommendations
In this study, a simple, fast, and cost-effective insect DNA extraction protocol has been developed, which is sufficient for routine PCR based and other diagnostic applications, such as DNA barcoding. By combining this protocol with variable analysis platforms such as various PCR, loop-mediated isothermal amplification, and high throughput sequencing, the efficiency of insect diagnostics, biological surveys, insect systematics, invasion research, evolutionary ecology and biodiversity analysis is supposed to be largely improved. This DNA extraction protocol can also assist timely tracking of pests to choose appropriate control measures.
Abbreviations
DNA: Deoxyribonucleic Acid
PCR: Polymerase Chain Reaction
CTAB: Cetyltrimethyl Ammonium Bromide
NaOH: Sodium Hydroxide
PBS: Polybutadiene-Styrene
COI: Cytochrome Oxidase I
BLAST: Basic Local Alignment Search Tool
LAMP: Loop-Mediated Isothermal Amplification
ROS: Reactive Oxygen Species
Author Contributions
Wang Jiaying: Funding acquisition, Investigation, Writing – original draft
Cui Junxia: Project administration
Liu Li: Data curation, Investigation, Resources
Wang Yuanjing: Validation, Writing – review & editing
Yan Shuyi: experiment conduct
Chen Xianfeng: Conceptualization, Supervision
Funding
This study received support from the Ningbo Public Interest Plan (2023S182) and the Research Foundation of the General Administration of Customs of the People’s Republic of China (2023HK048).
Conflicts of Interest
The authors declare no conflicts of interest.
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    Jiaying, W., Junxia, C., Li, L., Yuanjing, W., Shuyi, Y., et al. (2024). A Fast, Simple and Low-cost DNA Extraction Protocol from Common Ants and Beetles for Multiple Molecular Applications. American Journal of Bioscience and Bioengineering, 12(3), 48-55. https://doi.org/10.11648/j.bio.20241203.12

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    Jiaying, W.; Junxia, C.; Li, L.; Yuanjing, W.; Shuyi, Y., et al. A Fast, Simple and Low-cost DNA Extraction Protocol from Common Ants and Beetles for Multiple Molecular Applications. Am. J. BioSci. Bioeng. 2024, 12(3), 48-55. doi: 10.11648/j.bio.20241203.12

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    AMA Style

    Jiaying W, Junxia C, Li L, Yuanjing W, Shuyi Y, et al. A Fast, Simple and Low-cost DNA Extraction Protocol from Common Ants and Beetles for Multiple Molecular Applications. Am J BioSci Bioeng. 2024;12(3):48-55. doi: 10.11648/j.bio.20241203.12

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  • @article{10.11648/j.bio.20241203.12,
      author = {Wang Jiaying and Cui Junxia and Liu Li and Wang Yuanjing and Yan Shuyi and Chen Xianfeng},
      title = {A Fast, Simple and Low-cost DNA Extraction Protocol from Common Ants and Beetles for Multiple Molecular Applications
    },
      journal = {American Journal of Bioscience and Bioengineering},
      volume = {12},
      number = {3},
      pages = {48-55},
      doi = {10.11648/j.bio.20241203.12},
      url = {https://doi.org/10.11648/j.bio.20241203.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.bio.20241203.12},
      abstract = {The rapid development of molecular biology tools in insect systematics, invasion research, evolutionary ecology and biodiversity analysis has led to faster and greater progress in understanding insect behavior and biology. Efficient DNA extraction is the foremost step and serves as the vital foundation. Several rapid DNA extraction methods have been established, which are often time-consuming and labour-intensive. Here, a simple, fast, low-cost DNA extraction protocol for common insect samples was developed basing on 28 specimens of 16 insect species (7 ants, 9 bark and ambrosia beetles). The new protocol was shown to be feasible and highly efficient by comparison with commercial kit in terms of DNA yield, purity and PCR sensitivity. The concentration of DNA through the new rapid method was higher than that through commercial kit, whether in ant or beetle samples. A better quality of DNA extracted via kit was indicated by A260/A280 mostly ranging from 1.80 to 2.00. There was little difference between DNA extracted from adult and nymphal insects. PCR sensitivity of extracted DNA using both protocols was comparable. For nested PCR, amplification after two rounds yielded a bright signal using template DNA through both methods. But for PCR using primers of LCO1490 and HCO2198, the success ratio was lower (85.18%). Through BLAST, these amplicons were matched to related data with high identity. By combining this protocol with variable analysis platforms such as common PCR, loop-mediated isothermal amplification, and high throughput sequencing, it could assist insect diagnostics, biological surveys and invasion researches.
    },
     year = {2024}
    }
    

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  • TY  - JOUR
    T1  - A Fast, Simple and Low-cost DNA Extraction Protocol from Common Ants and Beetles for Multiple Molecular Applications
    
    AU  - Wang Jiaying
    AU  - Cui Junxia
    AU  - Liu Li
    AU  - Wang Yuanjing
    AU  - Yan Shuyi
    AU  - Chen Xianfeng
    Y1  - 2024/05/17
    PY  - 2024
    N1  - https://doi.org/10.11648/j.bio.20241203.12
    DO  - 10.11648/j.bio.20241203.12
    T2  - American Journal of Bioscience and Bioengineering
    JF  - American Journal of Bioscience and Bioengineering
    JO  - American Journal of Bioscience and Bioengineering
    SP  - 48
    EP  - 55
    PB  - Science Publishing Group
    SN  - 2328-5893
    UR  - https://doi.org/10.11648/j.bio.20241203.12
    AB  - The rapid development of molecular biology tools in insect systematics, invasion research, evolutionary ecology and biodiversity analysis has led to faster and greater progress in understanding insect behavior and biology. Efficient DNA extraction is the foremost step and serves as the vital foundation. Several rapid DNA extraction methods have been established, which are often time-consuming and labour-intensive. Here, a simple, fast, low-cost DNA extraction protocol for common insect samples was developed basing on 28 specimens of 16 insect species (7 ants, 9 bark and ambrosia beetles). The new protocol was shown to be feasible and highly efficient by comparison with commercial kit in terms of DNA yield, purity and PCR sensitivity. The concentration of DNA through the new rapid method was higher than that through commercial kit, whether in ant or beetle samples. A better quality of DNA extracted via kit was indicated by A260/A280 mostly ranging from 1.80 to 2.00. There was little difference between DNA extracted from adult and nymphal insects. PCR sensitivity of extracted DNA using both protocols was comparable. For nested PCR, amplification after two rounds yielded a bright signal using template DNA through both methods. But for PCR using primers of LCO1490 and HCO2198, the success ratio was lower (85.18%). Through BLAST, these amplicons were matched to related data with high identity. By combining this protocol with variable analysis platforms such as common PCR, loop-mediated isothermal amplification, and high throughput sequencing, it could assist insect diagnostics, biological surveys and invasion researches.
    
    VL  - 12
    IS  - 3
    ER  - 

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