From: Genetic, morphological, and chemical patterns of plant hybridization
| Locus | Phenotypic value | ||||
|---|---|---|---|---|---|
| Species A | Species B | F1 | Transgressive F2 hybrids | ||
| 1 | +1, +1 | −1, −1 | +1, −1 | +1, +1 | −1, −1 |
| 2 | +1, +1 | −1, −1 | +1, −1 | +1, +1 | −1, −1 |
| 3 | −1, −1 | +1, +1 | +1, −1 | +1, +1 | −1, −1 |
| 4 | −1, −1 | +1, +1 | +1, −1 | +1, +1 | −1, −1 |
| Net phenotypic value | 0 | 0 | 0 | +8 | −8 |