Previous studies have concluded that thoroughbred racehorse speed is improving very slowly, if at all, despite heritable variation for performance and putatively intensive selective breeding. This has
The percentage of raced Coldblooded trotters that started their first race at 3 years of age, and the average age for the first start, presented for each DMRT3 genotype.
We quantified inbreeding based on runs of homozygosity (ROH) using 297K SNP genotypes from 6,128 horses born in Europe and Australia, of which 13.2% were unraced.Â
