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Table 1 Comparison of ear traits between Zheng58 × lx9801 and Zheng58 × lx9801hlEW2b in six environments

From: Comparative transcriptomic analysis of maize ear heterosis during the inflorescence meristem differentiation stage

Traits Env. Zheng58×lx9801 Zheng58×lx9801hlEW2b P-value Over-standard heterosis
Ear width (mm) E1 50.71±1.00 52.70±1.30** 1.17E-03 3.92%
E2 46.16±0.96 47.64±1.32* 1.04E-02 3.21%
E3 51.24±0.65 53.08±1.11*** 2.65E-04 3.59%
E4 50.09±1.43 53.12±1.26*** 8.62E-05 6.00%
E5 51.18±1.50 55.49±1.23*** 6.43E-07 8.43%
E6 52.22±1.61 56.47±1.45*** 5.21E-07 8.14%
Average 50.27±1.19 53.08±1.28** 1.99E-03 5.55%
Axile width (mm) E1 29.07±0.37 31.67±0.24* 2.90E-02 8.94%
E2 33.80±1.23 34.33±0.97* 4.24E-02 1.57%
E3 33.49±1.41 35.36±2.09* 1.70E-02 5.58%
E4 33.46±1.58 34.52±1.08* 4.04E-02 3.17%
E5 31.56±1.03 32.33±0.94 3.90E-01 2.44%
E6 32.93±1.16 35.44±1.25** 4.39E-03 7.62%
Average 32.39±1.13 33.94±1.10 8.72E-02 4.89%
Ear length (cm) E1 19.18±0.77 19.25±0.78 8.43E-01 0.30%
E2 18.56±1.14 19.10±0.75 2.27E-01 2.90%
E3 19.44±0.85 18.86±1.30 9.14E-02 -2.98%
E4 18.35±1.49 17.58±0.93 1.83E-01 -4.19%
E5 17.24±1.20 17.90±0.96 7.50E-02 3.80%
E6 16.99±1.24 17.27±0.73 6.38E-01 1.60%
Average 18.29±1.12 18.33±0.91 3.43E-01 0.24%
Kernel row number E1 13.80±1.48 14.40±0.84 2.79E-01 4.35%
E2 13.60±1.26 13.40±1.65 7.64E-01 -1.46%
E3 13.40±1.65 13.20±1.40 7.73E-01 -1.40%
E4 12.80±1.03 13.20±1.03 3.98E-01 3.13%
E5 13.11±1.45 13.79±1.03 2.76E-01 5.20%
E6 13.71±1.36 14.51±1.33 4.54E-01 5.85%
Average 13.40±1.37 13.75±1.21 4.91E-01 2.61%
Kernel number per row E1 36.00±3.02 34.60±1.65 2.14E-01 -3.80%
E2 38.70±1.16 37.20±2.35 8.68E-02 -3.80%
E3 38.70±1.89 37.30±2.36 1.60E-01 -3.61%
E4 37.20±1.99 38.40±2.01 1.96E-01 3.23%
E5 36.69±2.91 37.76±2.08 9.91E-02 2.90%
E6 36.46±2.58 35.20±2.90 7.76E-02 -2.60%
Average 37.29±2.26 36.74±2.23 1.39E-01 -1.28%
Ear weight (g) E1 181.00±22.35 204.00±10.75** 8.87E-03 12.70%
E2 118.93±5.79 125.45±6.38* 2.78E-02 5.49%
E3 211.00±13.70 225.00±14.34* 3.85E-02 6.64%
E4 195.00±13.54 216.00±24.13* 2.74E-02 10.77%
E5 169.67±10.29 189.62±14.32** 6.07E-03 10.20%
E6 201.97±11.62 212.35±8.80* 1.70E-02 5.14%
Average 179.44±12.88 195.40±13.12* 2.09E-02 8.03%
  1. Note: E1, E2, E3, E4, E5 and E6 are Xinxiang 2015, Hebi 2015, Xinxiang 2016, Hebi 2016, Xinxiang 2018 and Hebi 2018 China, respectively. *, ** and *** indicate significant differences at the 0.05, 0.01 and 0.001 probability level