Global rates of biological invasion are rising, negatively impacting native biodiversity and ecosystem services, and hybridization may enhance this by increasing genetic variation and fitness in invasive species.
The study focused on blowflies in New Zealand, which are believed to have invaded from Australia between 1779 and 1841, analyzing genome-wide SNPs from 154 individuals across 24 populations to assess gene flow and hybridization.
Results indicated weak genetic structure in New Zealand populations, suggesting high gene flow, with evidence of both interspecific hybridization between species and intraspecific admixture among populations, underscoring the significance of hybridization in the context of biological invasions.