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Updated: May 5, 2026

Development and Testing of Species-specific Quantitative PCR Assays for Environmental DNA Applications

Development and Testing of Species-specific Quantitative PCR Assays for Environmental DNA Applications

Published on: November 5, 2020

A retrospective approach to testing the DNA barcoding method.

David G Chapple¹, Peter A Ritchie

¹School of Biological Sciences, Monash University, Clayton, Victoria, Australia ; Allan Wilson Centre for Molecular Ecology and Evolution, School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand.

|November 19, 2013

Summary

This summary is machine-generated.

DNA barcoding shows moderate success in identifying New Zealand skinks but struggles with species complexes. Integrated taxonomic approaches are more effective for biodiversity discovery and documentation.

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Area of Science:

Zoology
Molecular Biology
Taxonomy

Background:

DNA barcoding was introduced as a standardized method for species identification and discovery.
Despite successes, frequent failures question its accuracy as a rapid taxonomic tool.

Purpose of the Study:

To retrospectively assess DNA barcoding's accuracy for New Zealand skink classification using 1977 data.
To compare DNA barcoding efficacy with current morphological and molecular taxonomic approaches.
To evaluate DNA barcoding's capacity for species discovery in this group.

Main Methods:

Retrospective application of DNA barcoding to New Zealand skink classification data from 1977.
Comparison with current taxonomy derived from morphological and molecular data.
Analysis of species delimitation challenges, including the absence of a barcoding gap.

Main Results:

DNA barcoding demonstrated moderate-to-high success in identifying specimens (78-98% for 1977 data, 53-99% for current data).
It correctly flagged distinct taxa (77-100% for 1977 data) but often failed to detect species complexes.
Species discovery capacity varied by method; recent speciation and hybridization hindered delimitation.

Conclusions:

DNA barcoding has potential for specimen identification and species discovery in New Zealand skinks, but its error rate poses challenges.
Integrated taxonomic approaches are recommended for more effective biodiversity discovery and description in this group.
The absence of a barcoding gap due to recent evolutionary events impacts DNA barcoding efficacy.