Data for manuscript ID: ECE-2021-04-00657. Consists of four datasets and one README file. One dataset (ECE-2021-04-00657-R2-microsat-MOSHER.csv) is the microsatellite dataset and is based on the format of a STRUCTURE file. Alleles for each loci are separated into two columns. PopID relates to geographic region from which the sample was collected. Two data sets represent the genotype-by-sequencing (GBS) work and are based on the format of a STRUCTURE file. One (ECE-2021-04-00657-R2-gbs-tripcomp-MOSHER.csv) includes samples from the British Columbia, CA, geographic regions and triplicate and duplicate samples. The other (ECE-2021-04-00657-R2-gbs-notrips-MOSHER.csv) includes all geographic regions and has the replicates removed. For both GBS datasets; missing data is coded with '-9', alleles for each loci are separated into two columns, and PopID relates to geographic region from which the sample was collected. The final dataset (ECE-2021-04-00657-R2-gbs-mtDNA-MOSHER.csv) is the mtDNA data from the genotype-by-sequencing data, and is based on the format of a NEXUS file. Missing data is coded with '?'.