Molecular Phylogeny of Drosophilidae

The family Drosophilidae, encompassing over 4,400 species of fruit flies, represents a cornerstone for evolutionary and genetic research. Molecular phylogeny has transformed our understanding of relationships within this group by deploying DNA and RNA sequence data to reconstruct evolutionary history. Early studies relied on a handful of mitochondrial and nuclear gene fragments, which provided preliminary frameworks but often lacked resolution at deeper nodes and among rapidly radiating lineages. The advent of multilocus datasets, whole‐genome sequences and large transcriptome assemblies has markedly increased both the breadth of taxon sampling and the number of molecular characters available for analysis. These advances have clarified the monophyly of major clades, resolved the positions of previously enigmatic species and revealed instances of gene tree heterogeneity arising from incomplete lineage sorting and introgression. Contemporary approaches integrate coalescent‐based species‐tree inference with concatenation methods, enabling robust hypotheses for the timing and sequence of diversification events, particularly in island radiations such as the Hawaiian Drosophilidae. The resulting phylogenetic frameworks not only underpin comparative studies of trait evolution—from wing morphology to reproductive anatomy—but also facilitate exploration of biogeographical patterns, ecological specialisation and the genetic basis of adaptive radiations across the globe.

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Molecular Phylogeny of Drosophilidae publication trend

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

Technical terms

Molecular phylogeny: Reconstruction of evolutionary relationships among organisms based on molecular sequence data.

Orthologous gene: A gene in different species that evolved from a common ancestral gene and retains the same function.

Species tree: A phylogenetic tree representing the evolutionary pathways of species, inferred by integrating multiple gene histories.

Transcriptome: The complete set of RNA transcripts produced by the genome, used to infer gene sequences for phylogenetic analysis.

Concordance factor: A measure of the proportion of genes or sites that support a particular phylogenetic relationship, indicating agreement among data partitions.

Incomplete lineage sorting: A phenomenon in which ancestral genetic variation is differentially inherited by descendant lineages, leading to discordant gene trees.

References

1. FlyBase: updates to the Drosophila genes and genomes database. Genetics (2024).
2. Character Congruence of Multiple Data Partitions and the Origin of the Hawaiian Drosophilidae. Molecular Phylogenetics and Evolution (1998).
3. A phylogenomic study of Steganinae fruit flies (Diptera: Drosophilidae): strong gene tree heterogeneity and evidence for monophyly. BMC Ecology and Evolution (2020).
4. Phylotranscriptomics Reveals Discordance in the Phylogeny of Hawaiian Drosophila and Scaptomyza (Diptera: Drosophilidae). Molecular Biology and Evolution (2022).
5. A Database of Wing Diversity in the Hawaiian Drosophila. PLOS ONE (2007).
6. Evolution of reproductive morphology among recently diverged taxa in the Drosophila mojavensis species cluster. Ecology and Evolution (2012).