TABLE 4.

Marker positions and estimated digenic epistatic effects dd_ij and aa_ij determined by two-way analyses of variance with variables Z₃ and H₃ of five biomass-related traits in Arabidopsis hybrid C24 × Col-0

	Marker i		Marker j		ddij
Trait	Chromosome	Positiona	Chromosome	Positiona	LOD score	Effect	p (%)b
Variable Z3
RD22	1	81	2	55	1.96	−2.68	5.06
RD22	2	24	5	37	1.77	2.53	4.57
RD22	4	24	5	14	2.54	−3.30	6.53
BY	2	10	5	53	1.96	10.48	5.1
BY	2	70	5	53	2.57	−12.16	6.7
BY	3	30	5	70	1.14	8.44	3.0
	Marker i		Marker j		aaij
Trait	Chromosome	Positiona	Chromosome	Positiona	LOD score	Effect	p (%)b
Variable H3
RD29	1	8	5	92	2.15	6.62	5.63
GR	1	8	5	92	2.56	0.57	9.1
DMC	2	29	5	92	2.30	0.23	10.7

For description of Z₃ and H₃ and traits see materials and methods.

^aPosition on chromosome according to the map published by Törjék et al. (2006).

^bProportion of genotypic variance explained by the marker pair interaction.