Table 1 . Number of families (N_F) and marker loci (N_L) used for QTL analyses in the four populations and various generations; the average number of seeds (N_S) used to determine the haploid induction rates (HIR); and the corresponding estimates of the genetic variance components (${\mathit{\sigma }}_g^2$), repeatabilities (w²), means, and ranges for HIR.

Population–generation	Code	NF	NL	NS	HIR [%]
					${\text{σ}}_{\text{g}}^{\text{2}}$	w2	Mean	Range
CAUHOI × UH400-F2	CAU-F2	185	89	246	8.25**	69	5.2	0.5–15.5
CAUHOI × UH400-F2:3	CAU-F3	161	89	189	1.52**	46	2.3	0.0–8.0
CAUHOI × UH400-F2:4	CAU-F4	124	89	317	3.50**	76	2.4	0.0–10.3
1680 × UH400-F2	1680-F2	124	106	237	6.59**	91	2.8	0.0–15.6
1680 × UH400-F2:3	1680-F3	113	106	264	10.65**	85	2.9	0.0–13.4
CML395 × UH400-F2:3	CML395-F3	171	191	153	0.40**	40	0.6	0.0–5.0
CML495 × UH400-F2:3	CML495-F3	183	183	171	1.88**	88	0.8	0.0–12.9

^**Significant at P < 0.01.