Strategies for sample labelling and library preparation in DNA metabarcoding studies.

Area of Science:

• Ecology and Evolutionary Biology
• Genomics and Bioinformatics
• Environmental Science

Background:

• Metabarcoding is a powerful tool for biodiversity profiling using DNA from environmental samples.
• Accurate sample identification is crucial for reliable metabarcoding data, especially in biodiversity research.
• Various strategies exist for adding sample-specific nucleotide identifiers, impacting data fidelity.

Purpose of the Study:

• To provide an overview of key metabarcoding workflows for sample labelling.
• To guide researchers in selecting appropriate metabarcoding strategies for their studies.
• To enhance the robustness and reliability of biodiversity assessments using metabarcoding.

Main Methods:

• Overview of three primary workflows for sample-specific labelling in metabarcoding: one-step PCR, two-step PCR, and tagged PCR.
• Focus on strategies for adding nucleotide identifiers during PCR or library preparation.
• Analysis of advantages, challenges, and limitations of each workflow on Illumina sequencing platforms.

Main Results:

• Different labelling strategies present unique advantages, challenges, and potential limitations.
• Inappropriate workflow selection can lead to misleading results and compromise data integrity.
• Understanding workflow consequences is key to robust biodiversity data generation.

Conclusions:

• Selecting the right metabarcoding workflow is critical for accurate biodiversity assessments.
• This overview aims to consolidate the utility of metabarcoding as a biodiversity assessment tool.
• Informed choices in metabarcoding strategies enhance the power of biodiversity research.