Four experimental backcross full-sib families (378, 454, 291 and 211 individuals) were produced by in vitro fertilization at Ifremer (Palavas-les-Flots, France). All 1334 individuals were genotyped with a ThermoFisher AxiomTM Sea Bass 57k SNP DlabChip at the genotyping platform Gentyane (INRAE, Clermont-Ferrand, France). SNP calling was done using ThermoFisher software AxiomAnalysisSuiteTM. Preliminary quality controls were applied with threshold values of 95% for SNP call rate and 90% for sample call rate.