Table 5.
Genetic correlations (rg) between stem dimensions (stem circumference and height), stomatal traits (adaxial, abaxial and total stomatal densities, adaxial and abaxial stomatal lengths, and ratio adaxial/abaxial densities) and carbon isotope discrimination (Δ) for the selected F1 genotypes of the D × N (deltoides × nigra, above the diagonal) and the D × T (deltoides × trichocarpa, below the diagonal) families (both 50 F1)
| Stem circumference | Stem height | Adaxial density | Abaxial density | Ratio | Adaxial length | Abaxial length | Δ | |
|---|---|---|---|---|---|---|---|---|
| Stem dimensions | ||||||||
| Stem circumference | – | 0·92 | −0·12 | −0·17 | −0·06 | 0·24 | 0·06 | 0·36 |
| Stem height | 0·87 | – | −0·06 | −0·15 | 0·02 | 0·17 | −0·15 | 0·09 |
| Stomatal traits | ||||||||
| Adaxial density | 0·03 | 0·24 | – | 0·63 | 0·85 | −0·35 | −0·49 | −0·24 |
| Abaxial density | –0·31 | 0·01 | 0·75 | − | 0·12 | 0·14 | −0·17 | −0·25 |
| Ratio | 0·33 | 0·32 | 0·78 | 0·17 | – | −0·54 | −0·52 | −0·14 |
| Adaxial length | −0·03 | −0·23 | −0·44 | −0·50 | −0·16 | − | 0·81 | 0·33 |
| Abaxial length | −0·27 | −0·36 | −0·27 | −0·51 | 0·11 | 0·71 | − | 0·23 |
| Δ | ||||||||
| 0·09 | −0·11 | 0·01 | −0·18 | 0·18 | 0·33 | 0·44 | – |