Table 1.

Estimates of variance components (σ²) and broad-sense heritability of 318 hybrids and 180 parents evaluated for seed yield (Mg ha⁻¹) across three environments.

Source	Hybrids	Parents
${\sigma }_{\mathrm{\text{Genotype}}}^2$	0.0267***	0.0266***
${\sigma }_{\mathrm{\text{GCA}}}^2$	0.0110*	–
${\sigma }_{\mathrm{\text{SCA}}}^2$	0.0156**	–
${\sigma }_{\mathrm{\text{Genotype}}\times \mathrm{\text{Environment}}}^2$	0.0805***	0.0770***
${\sigma }_{\mathrm{\text{Environment}}\times \mathrm{\text{GC}}\mathrm{\text{A}}}^2$a	0.0243***	–
${\sigma }_{\mathrm{\text{Environment}}\times \mathrm{\text{SC}}\mathrm{\text{A}}}^2$b	0.0561***	–
${\sigma }_{\mathrm{\text{Residual}}}^2$	0.0211	0.0211
Heritability	0.47	0.48

^{*, **, and ***}means significantly different from zero at P < 0.1, P < 0.01, and P < 0.001, respectively.

^aGeneral combining ability effects.

^bSpecific combining ability effects.