Data underlying genome-wide association study for bone traits in commercial layer hens in two different housing systems

01_genotypes.txt -- SNP chip genotypes in tab separated text.02_phenotypes.txt -- trait values and covariates, including body mass, bone strength, QCT and thermogravimetric phenotypes in tab separated text.03_phenotype_names.txt -- Associates column names in phenotype file with trait names used in paper.04_map.map -- Position of markers on (GRCg6a) in a Plink-style map file.