| Summary: | In this study, we identified and characterized 160 microsatellite loci from an expressed sequence tag (EST) database generated from immune-related organs of turbot (Scophthalmus maximus). A final set of 83 new polymorphic microsatellites were validated after the analysis of 40 individuals from Atlantic origin including both wild and farmed individuals. The allele number and the expected heterozygosity ranged from 2 to 18 and from 0.021 to 0.951, respectively. Evidences of null alleles at moderate-high frequencies were detected at six loci using population data. None of the analyzed loci showed deviations from Mendelian segregation after analysis of five full-sib families including ~92 individuals/family. The markers are used to consolidate the turbot genetic map and, since they are mostly EST-derived, they will be very useful for comparative genomic studies within flatfishes and with model fish species. Using an in silico approach, we detected significant homologies of microsatellite sequences with the EST databases of the flatfish species with highest genomic resources (Senegalese sole, Atlantic halibut, bastard halibut) at 31% of these turbot markers. The conservation of these microsatellites within Pleuronectiformes will pave the way for anchoring genetic maps of different species and identifying genomic regions related to productive traits. Table_1 Summary of the the technical characteristics of the 83 polymorphic microsatellite loci validated from the turbot (Scophthalmus maximus) EST database. Table_S1 Comparative analysis of turbot microsatellites with Senegalese sole (Solea senegalensis), bastard halibut (Paralichthys olivaceus) and Atlantic halibut (Hippoglossus hippoglossus).
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