Candidate genes in selected regions (Dh/sd).

Candidate genes located within regions that have been subject to positive selection in Thoroughbred ranked by Dh/sd score; the locus with the strongest evidence for selection is listed first. Loci were localised to chromosomes and their positions were determined by in silico ePCR (Table S1). Each selected region was defined by loci flanking the central locus. The number of Thoroughbred chromosomes genotyped (n), number of observed alleles (ko), observed heterozygosity (Ho), expected heterozygosity (He), standard deviation (SD), deviation from expected heterozygosity (Dh/sd) and the associated statistical significance values (P) are shown. FST values are also shown to indicate inter-population differentiation at each locus. Three loci were also found among the highest FST regions listed in Table 5 (TKY316, TKY222 and NVHEQ079). The number of genes (with Homo sapiens functional annotation) located within each defined region is given. Loci NVHEQ079 and UM176 are located adjacent on ECA17 and their defined regions overlap, resulting in five common candidate genes listed for both regions.