Table 3.
Power to Detect Adaptive Changes in Species with Different Effective Population Sizes
| Nonsynonymous Sites |
||||||
| Adaptive | Effectively Neutral | Synonymous Sites | α (%) | ωa (%) | MK Test P Value | |
| Species A (large Ne) | ||||||
| Polymorphisms | n.a. | 0 | 20 | |||
| Substitutions | 15 | 0 | 100 | |||
| 100 | 15 | 0.024 | ||||
| Species B (low Ne) | ||||||
| Polymorphisms | n.a. | 20 | 20 | |||
| Substitutions | 15 | 100 | 100 | |||
| 13 | 15 | 0.685 | ||||
Note.—Comparison between two hypothetical species (A and B) that have the same number of adaptive changes but different effective population sizes illustrated by a difference in the number of effectively neutral nonsynonymous sites. n.a., not applicable.