Data and code from: Population genomics of a cosmopolitan weed provides insights into its local adaptation and recent demographic history

This dataset accompanies the manuscript "Population genomics of a
cosmopolitan weed provides insights into its local adaptation and recent
demographic history" and contains the genomic, environmental, and
analytical resources used to investigate the evolutionary dynamics of
Erigeron canadensis across its native and non-native ranges. The dataset
includes VCF genotype files derived from ddRADseq of 640 individuals
across 280 populations, environmental data (climatic and anthropogenic
variables), and R code for data filtering, population genetic structure
analyses, landscape genomic modeling, and genomic offset predictions.
These resources support analyses of population structure, gene flow,
environmental associations, and potential maladaptation in non-native
ranges. The data are intended to facilitate further research on invasive
species genomics, genotype-environment associations, and the role of
selfing and multiple introductions in plant invasion success.