Microfluidic Enrichment Barcoding (MEBarcoding): a new method for high throughput plant DNA barcoding.

Area of Science:

• Genomics
• Molecular Biology
• Bioinformatics

Background:

• DNA barcoding is crucial for species identification across various scientific fields.
• Existing methods can be time-consuming and costly for large-scale applications.
• Public DNA barcode databases require expansion for comprehensive plant lineage coverage.

Purpose of the Study:

• To introduce Microfluidic Enrichment Barcoding (MEBarcoding) as a high-throughput, cost-effective method for plant DNA barcoding.
• To demonstrate the efficacy of MEBarcoding using a microfluidic PCR workflow with Illumina sequencing.
• To generate a reference library of plant DNA barcodes for underrepresented lineages.

Main Methods:

• Developed a microfluidic PCR workflow utilizing the Fluidigm Access Array for simultaneous amplification of targeted regions in 48 plant DNA samples.
• Employed hundreds of PCR primer pairs to generate up to 23,040 PCR products in a single thermal cycling protocol.
• Tested four primary plant DNA barcode loci (rbcL, matK, trnH-psbA, ITS) on 96 samples using Illumina MiSeq sequencing.

Main Results:

• Successfully generated a substantial volume of plant DNA barcode data efficiently.
• Built a reference library encompassing 78 families and 96 genera across major plant lineages.
• Demonstrated MEBarcoding as an efficient alternative to traditional PCR and Sanger sequencing for large-scale DNA barcoding.

Conclusions:

• MEBarcoding provides an efficient and cost-effective solution for high-throughput plant DNA barcoding.
• This method significantly contributes to the expansion of public DNA barcode databases.
• MEBarcoding facilitates more comprehensive species identification and biodiversity assessments.