Accelerating Moss Identification Through the Development of Specific DNA Barcodes Based on the Whole Chloroplast...

Area of Science:

• Botany
• Molecular Biology
• Genomics

Background:

• Mosses (bryophytes) are ecologically vital early land plants with horticultural and medicinal uses.
• Accurate moss identification is challenging due to taxonomic complexity and a lack of specialists.
• DNA barcoding offers a promising solution for precise moss identification.

Purpose of the Study:

• To identify optimal DNA barcodes for mosses at the chloroplast genome level.
• To develop reliable molecular markers for moss species identification and phylogenetic reconstruction.
• To address limitations of existing markers not suited for mosses.

Main Methods:

• Analysis of 61 complete moss chloroplast genomes from diverse taxa.
• Selection of 12 highly variable regions as candidate DNA barcodes based on nucleotide polymorphism.
• Experimental validation of primer universality and DNA barcode efficacy using 103 samples.

Main Results:

• Construction of the first family-level moss phylogeny using whole chloroplast genomes.
• Identification of atpB-rbcL, psaI-accD, ycf2, ycf1, matK, rpoB-trnC, and clpP as effective DNA barcodes.
• Demonstration of high primer universality (>90%) for newly designed markers.

Conclusions:

• The identified DNA barcodes enable accurate moss identification and phylogenetic analysis.
• Inconsistencies in public chloroplast genome data highlight the need for standardized submissions.
• Standardized data submission with reference genomes is recommended for future moss research.