Table 2.
Method | Organism | Sample size (# of mutations) | DFE | Beneficial mutation rate | References |
---|---|---|---|---|---|
Marker frequencies | E. coli | 66 | Exponential or Γ | 4 × 10−9 | 74 |
Marker frequencies | E. coli | 30 | Peaked, unimodal | 5.9 × 10−8 | 44 |
Marker frequencies | E. coli | 72 | Exponential, uniform, and Dirac δ | 2 × 10−7 | 46 |
Marker frequencies | E. coli | 75 and 87 | Γ | 10−5 | 64 |
Marker frequencies | E. coli | K43N: 81; K88E: 102 | K43N: cannot reject log-normal (Weibull domain) | K43N: 5 × 10−5; K88N: 4 × 10−5 | 45 |
K88E: β (reject Weibull) | |||||
Marker frequencies | P. fluorescens | 68 | Weibull | 3.8 × 10−8 | 75 |
Mean fitness over time | A. nidulans | 260 | Unimodal, positively skewed | – | 65 |
Mean fitness over time | P. aeruginosa | 288 | Unimodal for one genotype, bimodal for the other two. | 6.6 × 10−8 | 22 |