Table 1.

Numbers of epistatic combinations significant at the 1% level for distance, duration, and speed

	Number significant	FDR	aa	ad	da	dd	Chromosomes most involved
Distance	78	0.55	0.33 (26)	0.55 (41)	0.56 (27)	0.79 (40)	2, 9, 11, 12
Duration	83	0.52	0.33 (31)	0.51 (35)	0.50 (35)	0.77 (40)	2, 5, 10, 11
Speed	78	0.55	0.36 (21)	0.58 (36)	0.50 (31)	0.84 (28)	2, 7, 12

All are significantly greater (P < 0.01 from chi-square tests) than the theoretical number (43) of epistatic interactions expected to be significant at this level. Means of the absolute standardized values of the 4 epistatic components (and the number significant) as well as the chromosomes most involved in epistasis also are given.