1 November 2021 Jeffrey M. Kidd University of Michigan This directory contains a callable genome mask file calculated from 1,987 samples processed by the Dog10K Consortium. Regions of the genome that are accessible by short read sequencing were identified from the alignment of 1,987 samples. Positions that are ā€˜Nā€™ in the genome reference, positions where >=10% of aligned reads have a mapping quality (MQ) of 0, and regions where the total coverage was more than 50% away from the median coverage were identified as failing the callability mask. Cutoffs were determined separately for the autosomes and X-PAR region and the non-PAR segment of the X chromosome. Cutoffs: Region Median Low High Autosomes+X PAR 36634 18317 54951 non-PAR X 27621 13810.5 41431.5 Regions that pass these criteria, and thus are amendable to analysis using short-read data, are reported in the file PASS.bed. A total of 2,259,749,455 positions pass the above criteria.