TABLE 1

First and second degree statistics for maize TC progenies from parent lines (P1 and P2) and 380 F3 lines (from cross P1 × P2) with inbred testers T1 and T2 in Experiment 1 for GY, GM, KW (four environments), PC (three environments), and PH (nine environments)

Entries (N)Grain yield (GY) (Mg ha−1)Grain moisture (GM) (g kg−1)Kernel weight (KW) (mg)Protein concentration (PC) (g kg−1)Plant height (PH) (cm)
ParameterT1T2T1T2T1T2T1T2T1T2
Testcross meansa
P159.91 ± 0.21b10.84 ± 0.24328.1 ± 2.5292.7 ± 2.6337.9 ± 2.4336.8 ± 2.6108.3 ± 0.80112.0 ± 0.93252.4 ± 1.4254.0 ± 1.3
P2510.56 ± 0.2111.33 ± 0.24315.9 ± 2.5299.8 ± 2.6283.6 ± 2.4297.5 ± 2.6102.0 ± 0.80105.5 ± 0.93244.9 ± 1.4243.0 ± 1.3
Embedded Image 1010.23 ± 0.1511.09 ± 0.17322.0 ± 1.7296.2 ± 1.8310.7 ± 1.7317.2 ± 1.8105.1 ± 0.57108.8 ± 0.66248.7 ± 1.0248.5 ± 0.9
Embedded Image 38010.28 ± 0.0311.39 ± 0.03319.6 ± 0.4293.2 ± 0.4306.8 ± 0.5311.2 ± 0.5104.9 ± 0.12108.1 ± 0.13251.1 ± 0.3251.4 ± 0.3
Range of F3 lines8.83, 11.649.88, 13.08297.8, 342.2261.7, 315.1282.2, 339.8279.7, 335.795.7, 111.599.1, 115.0235.2, 264.3231.5, 271.3
Variance components
Embedded Image 0.142 ± 0.020**0.129 ± 0.020**35.33 ± 3.56**59.44 ± 5.30**95.39 ± 8.03**76.85 ± 6.62**3.58 ± 0.37**5.10 ± 0.50**26.64 ± 2.18**33.21 ± 2.64**
Embedded Image 0.106 ± 0.025**0.155 ± 0.028**17.45 ± 2.61**20.53 ± 2.57**13.81 ± 3.10**19.03 ± 2.77**1.32 ± 0.26**2.01 ± 0.28**5.07 ± 1.03**4.69 ± 0.97**
Embedded Image 0.751 ± 0.0300.811 ± 0.03270.22 ± 2.7865.10 ± 2.5692.18 ± 3.6474.14 ± 2.936.06 ± 0.285.78 ± 0.2650.75 ± 1.3447.71 ± 1.26
Heritability
Embedded Image 0.540.480.730.820.860.850.710.760.890.91
95% C.I. on Embedded Image c0.46, 0.610.38, 0.560.68, 0.770.78, 0.840.84, 0.880.82, 0.870.66, 0.760.71, 0.800.87, 0.900.90, 0.92
Correlation coefficientsd
Embedded Image 0.33**0.62**0.76**0.64**0.79**
Embedded Image 0.63 ± 0.09b0.73 ± 0.040.88 ± 0.020.80 ± 0.040.87 ± 0.02
  • ** Significant at P < 0.01.

  • a Embedded Image mean of P1 and P2; Embedded Image mean of F3 lines.

  • b Standard errors are attached.

  • c Confidence intervals of Embedded Image were calculated by the method of Knapp et al. (1985).

  • d Phenotype (Embedded Image ) and genotype (Embedded Image ) correlation coefficients between TC progenies with T1 and T2.