#### Description of file contents ## grouseQCpass.map PLINK MAP file containing chromosomal locations of 271 SNPs that passed quality control. See supplementary materials S1 in main article for full information for the full set of 384 SNPs. ## grouseQCpass_genotypes.txt Tab-delimited text file containing SNP genotypes for 695 samples, in truncated PLINK PED format: Column 1: Sample identifier Columns 2-543: Genotypes for 271 SNPs (two columns per SNP) ## grouseQCpass_metadata.txt Tab-delimited text file containing sampling-related and phenotype data for 695 individuals. Column 1: Sample identifier Column 2: Sampling site Column 3: Sampling year Column 4: Sampling month Column 5: Sex (M/F) Column 6: Age (Young/Old) Column 7: Comb area (mm^2) Column 8: Body mass (g) Column 9: Wing length (mm) Column 10: Parasite load (worms per bird) Column 11: Sampling period (early/mid/late). Combinations of sampling years. Column 12: Sampling season (spring/autumn). Combinations of sampling months. Column 13: Condition index (residuals from log10 body mass vs. log10 wing length linear model) Column 14-16: Principal components of mixed correspondence analysis (sex, age, condition index); missing condition indices imputed. Column 17-19: Principal components of mixed correspondence analysis (sex, age, condition index); no imputation.