TABLE 2

First and second degree statistics for maize TC progenies from parent lines (P1 and P2) and 127 F3 lines (from cross P1 × P2) with inbred testers T1 and T2 in Experiment 2 for five agronomic traits measured in four 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
P179.48 ± 0.11b8.80 ± 0.07327.1 ± 1.0322.2 ± 1.5356.7 ± 2.2344.9 ± 2.8105.9 ± 1.11111.6 ± 1.02255.5 ± 1.0244.9 ± 0.9
P2610.45 ± 0.119.62 ± 0.08365.3 ± 1.1329.0 ± 1.6304.2 ± 2.2298.4 ± 2.897.5 ± 1.13105.8 ± 1.04246.6 ± 1.1236.3 ± 0.9
Embedded Image 139.97 ± 0.089.21 ± 0.06368.7 ± 0.8325.6 ± 0.7330.5 ± 1.6321.7 ± 2.0101.7 ±0.80108.7 ± 0.74251.0 ± 0.8240.6 ± 0.6
Embedded Image 12710.10 ± 0.049.34 ± 0.03366.7 ± 0.5323.9 ± 0.5330.1 ± 0.9321.2 ± 0.9100.9 ± 0.36109.6 ± 0.23252.7 ± 0.6244.9 ± 0.5
Range of F3 lines8.78, 11.068.01, 10.20354.6, 388.7308.7, 341.9306.1, 356.4295.4, 348.395.5, 108.5103.4, 116.9234.7, 270.5227.5, 265.3
Variance components
Embedded Image 0.112 ± 0.022**0.097 ± 0.017**21.27 ± 3.74**30.56 ± 4.71**75.27 ± 12.45**74.98 ± 11.89**4.67 ± 0.99**4.87 ± 0.89**29.42 ± 4.89**33.29 ± 4.76**
Embedded Image 0.027 ± 0.020−0.006 ± 0.0133.16 ± 1.8910.60 ± 2.29**13.92 ± 7.32**32.65 ± 6.57**5.54 ± 0.92**4.78 ± 0.68**−1.35 ± 3.031.01 ± 1.78
Embedded Image 0.369 ± 0.0240.283 ± 0.01830.80 ± 2.0234.26 ± 2.20119.87 ± 8.9190.51 ± 6.7110.28 ± 0.767.50 ± 0.5662.17 ± 4.0035.70 ± 2.29
Heritability
Embedded Image 0.680.740.820.820.800.790.640.700.800.88
95% C.I. on Embedded Image c0.56, 0.760.65, 0.800.75, 0.870.75, 0.860.73, 0.850.72, 0.840.50, 0.730.59, 0.770.72,0.850.83, 0.91
Correlation coefficientsd
Embedded Image 0.39**0.53**0.60**0.57**0.65**
Embedded Image 0.62 ± 0.12b0.60 ± 0.070.73 ± 0.080.76 ± 0.280.79 ± 0.07
  • ** 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.