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The seven deadly sins of DNA barcoding
1Bio-Protection Research Centre, Lincoln University, PO Box 84, Lincoln, 7647, Canterbury, New Zealand.
Molecular Ecology Resources
|January 3, 2013
Summary
DNA barcoding offers broad benefits but suffers from methodological shortcomings. This study identifies seven common deficiencies in DNA barcoding research and proposes improvements for more accurate species identification and discovery.
Area of Science:
- Biological Sciences
- Genetics
- Taxonomy
Background:
- DNA barcoding is a powerful tool with wide applications in biology.
- Existing studies often conflate species discovery with specimen identification, leading to methodological issues.
Purpose of the Study:
- To identify and assess common deficiencies in DNA barcoding research.
- To propose improvements for more reliable and accurate DNA barcoding outcomes.
Main Methods:
- Critical assessment of common analytical methods used in DNA barcoding literature.
- Review of experimental designs and hypothesis generation in DNA barcoding studies.
Main Results:
- Identified seven common deficiencies in DNA barcoding studies.
- Highlighted inappropriate use of analytical methods like neighbor-joining trees and fixed distance thresholds.
- Emphasized the negative impact of misidentified voucher specimens on reference libraries.
Conclusions:
- Addressing these deficiencies is crucial for advancing DNA barcoding applications.
- Increased diligence in specimen identification and appropriate methodological choices are advocated.
- Proposed improvements aim to enhance the reliability and accuracy of DNA barcoding research.
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