Table 3. Correlations between general heterozygosity/special heterozygosity and hybrid performance/mid-parent heterosis in three environments for the nine yield-correlated traits with significant heterosis.
Traits§ | SY | SP | BY | PN | HI | PH | PY | SN | BN | Mean r2 | ||
Hybrid performance | General heterozygosity | N6 | 0.18* | 0.15* | 0.11* | 0.10* | 0.13* | 0.08 | 0.09 | 0.06 | -0.03 | 0.012 |
S5 | 0.30‡ | 0.18* | / | 0.12* | / | 0.09 | 0.11* | 0.01 | 0.04 | 0.022 | ||
S6 | 0.13* | 0.09 | 0.10* | 0.06 | 0.08 | 0.02 | 0.07 | 0.04 | -0.01 | 0.006 | ||
Mean r 2 | 0.046 | 0.021 | 0.011 | 0.009 | 0.011 | 0.005 | 0.009 | 0.002 | 0.001 | 0.013 | ||
Special heterozygosity | N6 | 0.24‡ | 0.23‡ | 0.09 | 0.19* | 0.17* | 0.07 | 0.08 | 0.07 | -0.01 | 0.022 | |
S5 | 0.43‡ | 0.29‡ | / | 0.17* | / | 0.11* | 0.17* | 0.09 | 0.08 | 0.05 | ||
S6 | 0.22† | 0.09 | 0.09 | 0.14* | 0.07 | -0.07 | 0.04 | 0.09 | -0.06 | 0.012 | ||
Mean r 2 | 0.096 | 0.048 | 0.008 | 0.027 | 0.017 | 0.007 | 0.013 | 0.007 | 0.003 | 0.026 | ||
Mid-parent heterosis | General heterozygosity | N6 | 0.16* | 0.13* | 0.08 | 0.06 | 0.19* | 0.08 | 0.12* | 0.06 | 0.01 | 0.012 |
S5 | 0.29‡ | 0.20† | / | 0.11* | / | 0.13* | 0.13* | 0.05 | 0.01 | 0.025 | ||
S6 | 0.15* | 0.11* | 0.08 | 0.08 | 0.12* | 0.05 | 0.06 | 0.02 | -0.01 | 0.008 | ||
Mean r 2 | 0.045 | 0.023 | 0.006 | 0.007 | 0.024 | 0.009 | 0.012 | 0.002 | 0.000 | 0.014 | ||
Special heterozygosity | N6 | 0.21† | 0.19* | 0.02 | 0.12* | 0.19* | 0.07 | 0.13* | 0.04 | 0.01 | 0.017 | |
S5 | 0.39‡ | 0.27‡ | / | 0.16* | / | 0.16* | 0.14* | 0.09 | 0.01 | 0.044 | ||
S6 | 0.19* | 0.07 | 0.06 | 0.12* | 0.11* | 0.00 | 0.04 | 0.04 | -0.02 | 0.008 | ||
Mean r 2 | 0.078 | 0.038 | 0.002 | 0.019 | 0.025 | 0.010 | 0.013 | 0.004 | 0.000 | 0.022 | ||
Mean r 2 | 0.066 | 0.032 | 0.007 | 0.016 | 0.019 | 0.008 | 0.012 | 0.004 | 0.001 | 0.019 |
For the abbreviation of the traits (ordered according to their correlation coefficients with SY), see MATERIALS AND METHODS.
*, † and ‡ represent the significant level of P = 0.05, 01 and 0.001 respectively.