Data for: Population genomic insights into invasion success in the polyphagous agricultural pest, Halyomorpha halys

Invasive species are increasingly threatening ecosystems and agriculture
by rapidly expanding their range and adapting to environmental and
human-imposed selective pressures. The genomic mechanisms that underlie
such rapid changes remain unclear, especially for agriculturally important
pests. Here, we use genome-wide polymorphisms derived from native,
invasive, and intercepted samples and populations of the brown marmorated
stink bug (BMSB), Halyomorpha halys, to gain insights into population
genomics processes that have promoted the successful global invasion of
this polyphagous pest. Our analysis demonstrated that BMSB exhibits
spatial structure but admixture rates are high among introduced
populations, resulting in similar levels of genomic diversity across
native and introduced populations. These spatial genomic patterns suggest
a complex invasion scenario, potentially with multiple bridgehead events,
posing a challenge for accurately assigning BMSB incursions to their
source using reduced-representation genomic data. By associating allele
frequencies with the invasion status of BMSB populations, we found
significantly differentiated SNPs located in close proximity to genes for
insecticide resistance and olfaction. Comparing variations in allele
frequencies among populations for outlier SNPs suggests that BMSB invasion
success has likely evolved from standing genetic variation. In addition to
being a major nuisance of households, BMSB has caused significant economic
losses to agriculture in recent years and continues to expand its range.
Despite no record of BMSB insecticide resistance to date, our results show
high capacity for potential evolution of such characters, highlighting the
need for future sustainable and targeted management strategies.