Table 2.
Statistics from a multiple linear model (Type I sum of squares) showing the effects of species, reproduction mode and latitude (explanatory variables) on the mean chromosome number (response variable) of flatworm populations (n = 220). For populations with unknown mode of reproduction, an additional factor level was created. Significant P‐values (P < 0.05) are in bold
| Chromosome number | df | SS | F | P |
|---|---|---|---|---|
| Species | 2 | 17359 | 354 | <0.001 |
| Reproduction mode | 3 | 4878 | 66.5 | <0.001 |
| Latitude | 1 | 620.1 | 25.4 | <0.001 |
| Species × reproduction mode | 6 | 1620 | 11.0 | <0.001 |
| Species × latitude | 2 | 99.4 | 2.03 | 0.13 |
| Reproduction mode × latitude | 3 | 18.5 | 6.20 | 0.86 |
| Residuals | 202 | 4940 |