Molecular Taxonomy of Thrips Species

Molecular taxonomy of thrips has transformed our understanding of species diversity, evolutionary relationships and pest management. By analysing DNA sequences—particularly from mitochondrial genomes and nuclear markers—researchers have uncovered extensive gene rearrangements, cryptic species complexes and lineage-specific adaptations. Mitochondrial gene order variation and high rates of nucleotide substitution have emerged as powerful tools for delineating species boundaries in Thysanoptera, supplementing or correcting morphological identifications. DNA barcoding using the cytochrome c oxidase I region has revealed hidden diversity within economically important taxa, while advanced isothermal assays enable rapid, field-based detection of quarantine pests. Together, these molecular approaches inform phylogenetic frameworks, support global biosecurity efforts and guide the deployment of targeted control strategies against virus-transmitting and crop-damaging thrips.

Research from Nature Portfolio

One seminal study substantially expanded taxonomic coverage of thrips mitochondrial genomes by sequencing representatives from previously unsampled families. It documented extraordinarily high rates of gene rearrangement, control-region duplications and tRNA structural mutations. Phylogenetic analyses supported the monophyly of the two major suborders and identified shared derived rearrangements that act as synapomorphies for key clades. Ancestral state reconstructions revealed dynamic evolution of genome architecture, emphasising the need for broader sampling to resolve deep relationships within Thysanoptera. Another investigation presented the first complete mitochondrial genome of a Sericothripinae species, revealing extensive translocations of protein-coding and RNA genes relative to the ancestral insect pattern. Putative control regions showed evidence of duplication, and codon-usage biases highlighted lineage-specific evolutionary pressures. Phylogenetic inference placed Sericothripinae as sister to Thripinae, refining our understanding of subfamily relationships and underscoring the value of mitogenomic data in reconstructing thrips evolution.

Molecular Taxonomy of Thrips Species publication trend

The graph below shows the total number of articles in molecular taxonomy of thrips species across all publications each year (not limited to Nature Index journals).

Technical terms

Mitochondrial genome: The circular DNA molecule in mitochondria encoding genes used for energy production and phylogenetic studies.

Gene rearrangement: Alterations in the order of genes within a genome, often revealing evolutionary events.

DNA barcoding: Species identification technique based on sequencing a standard gene region, typically COI in animals.

Polymerase spiral reaction (PSR): An isothermal amplification method for rapid DNA detection without thermal cycling.

Control region: A non-coding segment of mtDNA involved in replication and transcription regulation, often duplicated in thrips.

Cryptic species: Genetically distinct species that are morphologically similar and may be overlooked without molecular data.

Phylogenetic inference: The reconstruction of evolutionary relationships among taxa using genetic or morphological data.

References

1. Relaxed purifying selection pressure drives accelerated and dynamic gene rearrangements in thrips (Insecta: Thysanoptera) mitochondrial genomes. International Journal of Biological Macromolecules (2023).
2. Rearrangement and evolution of mitochondrial genomes in Thysanoptera (Insecta). Scientific Reports (2020).
3. Development of a Polymerase Spiral Reaction-Based Isothermal Assay for Rapid Identification of Thrips palmi. Frontiers in Molecular Biosciences (2022).
4. DNA Barcoding: A Reliable Method for the Identification of Thrips Species (Thysanoptera, Thripidae) Collected on Sticky Traps in Onion Fields. Insects (2020).
5. The first complete mitochondrial genome of marigold pest thrips, Neohydatothrips samayunkur (Sericothripinae) and comparative analysis. Scientific Reports (2019).