Table 1.

Sample size needed to detect selection at 0.05 significance with 0.50 power.

Fitness dominance	Deleterious dominant	Deleterious recessive	Overdominance	Underdominance
Unequal allele frequencies (p = 0.1)
Weak selection (s = 0.01)	4.66 × 106	4.72 × 106	1.21 × 106	1.16 × 106
Medium selection (s = 0.05)	1.74 × 105	1.86 × 105	5.30 × 104	4.22 × 104
Strong selection (s = 0.1)	3.99 × 104	4.57 × 104	1.48 × 104	9.35 × 103
Equal allele frequencies (p = 0.5)
Weak selection (s = 0.01)	6.08 × 106	6.08 × 106	1.55 × 105	1.52 × 105
Medium selection (s = 0.05)	2.34 × 104	2.34 × 104	6.46 × 103	5.84 × 103
Strong selection (s = 0.1)	5.54 × 103	5.54 × 103	1.69 × 103	1.39 × 103

α = 0.05 and β = 0.5; sample sizes are computed using equation (12); fitness dominance parameters are as follows: deleterious dominant k = 1 - s, deleterious recessive allele k = 1/(1 - s), overdominance k = (1 + s)², underdominance k = (1 - s)