Table 1. 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.

	AA	CA	CC	P-value1
Started at 3 years of age (%)	56	57	52	0.56
Average age for first race (years)	3.7	3.7	3.8	0.44

¹A Kruskal-Wallis test was performed in R