Express barcoding with NextGenPCR and MinION for species-level sorting of ecological samples

Area of Science:

• Molecular Biology
• Biodiversity Science
• Bioinformatics

Background:

• DNA barcoding is crucial for specimen identification and biodiversity discovery.
• Current methods are often too costly or require specialized labs for time-sensitive applications.
• Underutilization persists in fields like citizen science, pest identification, and food authentication.

Purpose of the Study:

• To present a simplified, rapid, and cost-effective DNA barcoding workflow.
• To demonstrate its utility for time-sensitive species identification and discovery.
• To enable broader application of DNA barcoding in diverse research and applied settings.

Main Methods:

• Combined rapid DNA extraction (HotSHOT) with NextGenPCR thermocyclers for amplicon production.
• Utilized low-cost MinION sequencers for DNA sequencing.
• Integrated BLAST for specimen identification within the workflow.

Main Results:

• Successfully generated 250 DNA barcodes for 285 specimens within 6 hours.
• The workflow requires minimal, benchtop-compatible equipment (Thermocycler, NextGenPCR, Qubit, MinION).
• Achieved rapid and accurate species-level sorting.

Conclusions:

• This simplified workflow offers a faster, more accurate, and cost-effective alternative to traditional morpho-species sorting.
• It democratizes DNA barcoding for applications previously limited by cost and equipment.
• Facilitates rapid species discovery and identification in diverse, field-based scenarios.