Fig. 5

Frequencies of the genotypes at the RELN and STAU2 genes in groups of horses with variable pacing ability. The number of horses within each group is All horses N = 372, AA horses N = 340, 5-gaited AA horses N = 248, 4-gaited AA horses N = 82, CA horses N = 31, and Pace racers N = 10. ^†The frequency of the heterozygous genotypes (Rr and Ss) also included the rare haplotypes according to the haplotype analyses (1% of the sample size on ECA4 and 2% on ECA9)