Table 5.
Correlation coefficients between morphological conventional and phenomics descriptors.
| Descriptors | First principal component | Second principal component | Third principal component |
|---|---|---|---|
| Plant growth habit | 0.151 | ||
| Plant height (cm) | 0.154 | 0.176 | |
| Stem diameter (mm) | 0.266 | ||
| Leaf blade lobing | 0.258 | ||
| Leaf prickles (upper surface) | −0.165 | 0.184 | |
| Leaf surface shape | 0.236 | ||
| Leaf blade length (cm) | 0.291 | ||
| Leaf blade width (cm) | 0.306 | ||
| Corolla diameter (mm) | 0.184 | 0.153 | |
| Number of flower prickles (calyx) | −0.170 | 0.226 | |
| Number of sepals | 0.275 | ||
| Number of petals | 0.267 | ||
| Number of stamens | 0.266 | ||
| Fruit pedicel length (mm) | 0.218 | ||
| Fruit pedicel diameter (mm) | 0.218 | ||
| Fruit length/breadth ratio | 0.191 | ||
| Fruit weight (g) | 0.212 | ||
| Fruit calyx prickles | −0.190 | 0.253 | |
| Perimeter (cm) | 0.225 | ||
| Area (cm2) | 0.219 | ||
| Width mid-height (cm) | 0.204 | ||
| Maximum width (cm) | 0.206 | ||
| Height mid-width (cm) | 0.231 | ||
| Maximum height (cm) | 0.231 | ||
| Curved height (cm) | 0.231 | ||
| Fruit shape index external I | 0.209 | ||
| Fruit shape index external II | 0.209 | ||
| Curved fruit shape index | 0.167 | ||
| Proximal fruit blockiness | −0.371 | ||
| Distal fruit blockiness | 0.163 | 0.204 | |
| Fruit shape triangle | −0.349 | ||
| Circular | 0.189 | ||
| Rectangular | −0.245 | ||
| Shoulder height | 0.159 | ||
| Obovoid | 0.328 | ||
| Ovoid | −0.312 | ||
| Fruit shape index internal | 0.208 | ||
| Eigenvalue | 17.50 | 5.65 | 4.48 |
| Variance explained (%) | 37.23 | 12.04 | 9.53 |
| Cumulative variance explained (%) | 37.23 | 49.27 | 58.80 |
Values represent the correlation coefficients for the three first principal components in the collection of eggplant (S. melongena), wild relatives and interspecific hybrids evaluated. Only correlations with absolute values ≥0.150 have been listed.