Table 4.
Pairwise correlations among crude protein and mineral elements in cowpea inbred lines under non stress (below diagonal) and stress (above diagonal) conditions.
| P | CP | Mg | K | Cr | Zn | Fe | Pb | Cu | Mn | Se | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| P | - | -0.019 | 0.1122 | 0.2896* | 0.1195 | 0.0124 | 0.0201 | 0.0035 | -0.105 | -0.2653* | 0.061 |
| CP | 0.2405* | - | 0.1056 | 0.3590* | 0.0482 | -0.098 | -0.2329* | -0.019 | -0.3652* | 0.1324 | 0.1429 |
| Mg | 0.0453 | 0.0293 | - | 0.7091* | -0.006 | 0.6845* | 0.1659 | -0.071 | 0.0306 | 0.037 | 0.0672 |
| K | -0.065 | -0.027 | 0.6298* | - | -0.144 | 0.2737* | -0.007 | -0.024 | -0.069 | 0.0114 | 0.0355 |
| Cr | -0.047 | -0.134 | 0.1298 | 0.2953* | - | -0.089 | 0.1036 | -0.196 | -0.088 | 0.1031 | -0.052 |
| Zn | 0.3349* | -0.14 | 0.5650* | 0.3189* | 0.1351 | - | 0.3958* | -0.187 | 0.0882 | -0.182 | 0.0225 |
| Fe | 0.0351 | 0.2590* | 0.1562 | 0.1727 | 0.1476 | 0.2869* | - | -0.4711* | 0.158 | -0.133 | 0.3806* |
| Pb | 0.0505 | -0.142 | 0.0907 | 0.0427 | 0.1687 | -0.159 | -0.064 | - | -0.036 | 0.175 | -0.156 |
| Cu | 0.2546* | -0.118 | 0.1004 | 0.1584 | -0.163 | 0.1964 | 0.1811 | 0.0093 | - | -0.149 | -0.2455* |
| Mn | . | . | . | . | . | . | . | . | - | 0.0653 | |
| Se | 0.2085 | -0.201 | -0.101 | -0.054 | -0.157 | 0.0899 | -0.3504* | -0.034 | 0.2279 | - | - |
P=Phosphorus, CP = Crude protein, Mg = Magnesium, K=Potassium, Cr=Chromium, Zn = Zinc, Fe=Iron, Pb = Lead, Cu=Copper, Mn = Manganese, Se= Selenium, * = significant at 0.05.