plant-dna-barcoding
Plant DNA barcoding is a molecular identification technique that uses short, standardized genomic regions—such as rbcL and matK—to distinguish plant species based on their unique genetic sequences. This approach provides a rapid and accurate means of identifying specimens even from fragmentary material like seeds, pollen, or processed plant products, where morphological identification is impractical. For plant science, it accelerates biodiversity surveys, supports conservation efforts, and helps combat the mislabeling of medicinal or commercial plant species.
PubMed · 2026-03-26
Scientists analyzed DNA data from 151 studies to figure out how well genetic markers can tell plant species apart. They found that a surprisingly small number of carefully chosen DNA markers can distinguish species just as accurately as scanning hundreds of genes.
70.2% of the 1,713 plant species analyzed formed clean, distinct genetic groups — confirming most species have a traceable DNA identity.
89.2% of species had at least one unique DNA marker (species-specific SNP), with a median density of 193 such markers per million DNA letters.
Only ~3,000 randomly selected genetic variants are needed to reach maximum species-identification accuracy, and as few as 1–9 pre-selected markers can match the performance of hundreds of loci.