Data accessibility
All GBS sequence data are available under BioProject PRNJ742536 (http://www.ncbi.nlm.nih.gov/bioproject/742536). A sample manifest with the barcodes and sample ids, all R scripts for population analyses, and associated data files can be found at VTechData: DOI (for review these files may be found here: https://figshare.com/s/01d1e28c0810967b0017)