Estimates for Genetic Variance Components in Reciprocal Recurrent Selection in Populations Derived from Maize Single-Cross Hybrids

Table 3

Estimates for intrapopulation (𝜎²_𝐴11 and 𝜎²_𝐴22) and interpopulation (𝜎²_𝐴12 and 𝜎²_𝐴21) additive genetic variances, variances of deviations of the intra- by interpopulation additive effects (𝜎²_𝜏), and covariances of additive effects with their deviations (Côv_𝐴𝜏) in evaluations of intra- and interpopulation half-sib progenies from cycles 0 and 3 (C0 and C3).

Traits^a	𝜎^2𝐴11	𝜎^2𝐴12	𝜎^2𝜏12	Côv(𝐴1𝜏12)	Mean
	Population 1 C0
EW	275.70 ± 159.13^b	29.99 ± 165.24	375.11 ± 314.62	−155.205 ± 96.18	130
PH	188.74 ± 45.92	179.36 ± 49.48	229.92 ± 65.40	−59.82 ± 22.23	172.78
	Population 1 C3
EW	393.54 ± 136.67	191.29 ± 246.82	937.45 ± 440.93	−284.92 ± 104.94	125
PH	94.91 ± 39.41	147.52 ± 47.78	−9.56 ± 68.20	15.54 ± 21.07	175.44
Traits^a	𝜎^2𝐴22	𝜎^2𝜏21	𝜎^2𝐴21	Côv(𝐴2𝜏21)	Mean
	Population 2 C0
EW	667.35 ± 137.03	660.34 ± 161.92	1237.3 ± 293.59	−311.08 ± 85.29	140
PH	−3.43 ± 32.47	197.64 ± 53.98	240.40 ± 86.49	−9.83 ± 21.73	175.31
	Population 2 C3
EW	194.69 ± 136.99	1401.5 ± 298.35	1307.9 ± 411.11	−25.27 ± 95.15	151
PH	269.64 ± 58.11	208.71 ± 58.97	219.28 ± 102.26	−70.05 ± 32.20	178.37

aEW: ear weight (g/plant); PH: plant height (cm/plant).
^bConfidence intervals for estimates.