Table 4. Dominance of spinosad resistance based on a range of spinosad concentrations including LC50s from the susceptible parental strains and pooled F1 progeny of reciprocal crosses estimated for the tomato borer Tuta absoluta.
| Concentrations (µg a.i./mL) | Strains | No. insects | Mortality (%) | Survival performance | Estimated dominance (h) |
| 0.005 | Spinosad-resistant | 19 | 0.00 | 1.00 | - |
| Spinosad-susceptible | 29 | 3.45 | 0.97 | - | |
| Pooled F1 of reciprocal crosses | 30 | 0.00 | 1.00 | 1.00 | |
| 0.05 | Spinosad-resistant | 25 | 0.00 | 1.00 | - |
| Spinosad-susceptible | 28 | 25.00 | 0.75 | - | |
| Pooled F1 of reciprocal crosses | 29 | 0.00 | 1.00 | 1.00 | |
| 0.50 | Spinosad-resistant | 22 | 0.00 | 1.00 | - |
| Spinosad-susceptible | 30 | 100.00 | 0.00 | - | |
| Pooled F1 of reciprocal crosses | 31 | 58.06 | 0.42 | 0.42 | |
| 5.00 | Spinosad-resistant | 21 | 0.00 | 1.00 | - |
| Spinosad-susceptible | 29 | 100.00 | 0.00 | - | |
| Pooled F1 of reciprocal crosses | 30 | 100.00 | 0.00 | 0.00 | |
| 10.00 | Spinosad-resistant | 29 | 13.79 | 0.86 | - |
| Spinosad-susceptible | 31 | 100.00 | 0.00 | - | |
| Pooled F1 of reciprocal crosses | 30 | 100.00 | 0.00 | 0.00 |
The concentration range used also discriminates for high spinosad resistance, as observed in the spinosad-selected strain. The estimated dominance (h) varies from 0 (completely recessive) to 1 (completely dominant), where 0.5 corresponds to co-dominance, 0<h<0.5 corresponds to incompletely recessive and 0.5<h<1.0 corresponds to incompletely dominant.