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Pyrosequencing for Microbial Identification and Characterization
Published on: August 22, 2013
Pyrosequencing for mini-barcoding of fresh and old museum specimens
Shadi Shokralla1, Xin Zhou, Daniel H Janzen
1Biodiversity Institute of Ontario, Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada. sshokral@uoguelph.ca
Plos One
|August 6, 2011
Summary
Pyrosequencing enables rapid, cost-effective mini-barcode analysis from degraded DNA, aiding species identification using short DNA fragments from museum specimens.
Area of Science:
- Molecular Biology
- Genomics
- Taxonomy
Background:
- DNA barcoding is crucial for species identification and discovery.
- Sanger sequencing is standard for full-length cytochrome c oxidase subunit I (COI) barcodes.
- Degraded DNA in old specimens hinders full-length barcode retrieval.
Purpose of the Study:
- To evaluate pyrosequencing for rapid, cost-effective mini-barcode analysis.
- To assess the utility of mini-barcodes from degraded DNA for species identification.
Main Methods:
- Utilized four-enzymes single-specimen pyrosequencing.
- Generated mini-barcodes (up to 100 bp) from COI gene fragments.
- Analyzed 135 fresh and 50 old Lepidoptera specimens (53-97 years old).
Main Results:
- High-quality mini-barcode sequences were generated from both fresh and old specimens.
- Pyrosequenced mini-barcodes robustly matched Sanger-sequenced full barcodes.
- Pyrosequencing provided accurate species identification from short DNA fragments.
Conclusions:
- Pyrosequencing offers a rapid, cost-effective alternative for mini-barcode analysis.
- This method is valuable for identifying species from museum samples with degraded DNA.
- Facilitates linking unidentified specimens to known museum collections using short DNA fragments.
