Temporal and intra-horse consistency of circulating myostatin concentrations in Thoroughbred racehorses.

Genotype As expected, genotype had a highly significant impact on myostatin concentrations (Fig. 1 ): homozygotes had lower mean plasma myostatin concentration than heterozygous horses (p < 0.001), and heterozygous horses had lower mean myostatin concentration than wild type horses (p < 0.001).

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