Table 3.

Epistatic components generated from the QTL-QTL interactions affecting the activity traits

Interval	%	aa			ad			da			dd
		Mean	STD	N	Mean	STD	N	Mean	STD	N	Mean	STD	N
Distance	26.7	0.35	0.08	23	0.66	0.16	38	0.59	0.18	38	0.96	0.25	31
Duration	34.9	0.37	0.11	33	0.60	0.18	54	0.53	0.15	42	0.79	0.18	40
Speed	22.3	0.35	0.08	22	0.64	0.15	28	0.55	0.14	37	0.86	0.22	34

Shown are means, standard deviations (STD) and sample sizes (N) for the significant standardized, absolute epistatic components generated from the QTL pairs affecting distance, duration, and speed averaged over all 7 intervals. The mean percentage (%) impact of the significant components on the total phenotypic variability across all intervals for each of the traits also is given