Table 3. Generation-based population parameters for inbred and outbred lines of P. xylostella.
| Intrinsic rate of increase (r) |
Finite rate (λ) |
Net reproduction rate (R0) |
Generation time (T) |
|||||
|---|---|---|---|---|---|---|---|---|
| Outbred | Inbred | Outbred | Inbred | Outbred | Inbred | Outbred | Inbred | |
| F1 | 0.308 ± 0.011Aa | 0.193 ± 0.012Ba | 1.361 ± 0.015Aa | 1.213 ± 0.015Ba | 85.4 ± 12.8Aa | 36.4 ± 7.0Ba | 14.4 ± 0.1Aa | 18.5 ± 0.4Ba |
| F4 | 0.297 ± 0.013Aa | 0.172 ± 0.015Ba | 1.345 ± 0.018Aa | 1.188 ± 0.018Ba | 71.2 ± 12.4Aa | 22.9 ± 5.6Bb | 14.3 ± 0.1Aa | 18.0 ± 0.3Ba |
| F7 | 0.289 ± 0.012Aa | 0.125 ± 0.017Bb | 1.336 ± 0.015Aa | 1.133 ± 0.020Bb | 77.0 ± 12.6Aa | 12.3 ± 3.8Bc | 15.0 ± 0.1Ac | 19.7 ± 0.5Bb |
| F10 | 0.295 ± 0.010Aa | 0.011 ± 0.021Bc | 1.344 ± 0.014Aa | 0.984 ± 0.016Bc | 77.7 ± 11.0Aa | 1.3 ± 0.4Bd | 14.7 ± 0.1Ab | 18.0 ± 0.4Ba |
following the means ± SE within the same row in each population parameter indicates significant difference between two crosses (t-test; P < 0.05).
No identical lowercase letter following the means ±SE within the same column indicates significant difference between generations (Tukey-Kramer; P < 0.05).