The datafile is in GENEPOP format. It comprises genotype scores for 14 Crassostrea gigas-specific microsatellite loci. Locus names are listed at the beginning of the file under the title line, the first 7 loci are EST linked loci, the last 7 are anonymous loci. The first column under the loci names indicates the 6 population (WONE, WTWO, WTHR, AQON, AQTW, BONE) and their individuals. The genotypes for each individual and loci are in the columns 2 – 15. Missing genotypes are coded as "000". Allele scores for each locus are concatenated into six digits, with the first three letters representing allele "A", and the second three letters representing allele "B".