Source of variation | Sum of Squares | Percentage of variation | Variance components |
---|
Between groups | 239.036 | 56.65 | 3.575 |
Within groups | 53.533 | 3.32 | 0.212 |
Within populations | 439.042 | 39.99 | 2.523 |
Fixation Indices | Â | Â | P-value |
FCT | 0.566 | Â | 0.013 |
FSC | 0.077 | Â | < 0.001 |
FST | 0.600 | Â | < 0.001 |
- Two groups were defined, western Atlantic, comprising the combination of the Brazilian, Caribbean and central Atlantic island populations, and eastern Atlantic, composed of Cape Verde and Sao Tome. Fixation indices are FCT: genetic variation between regions; FSC: genetic variation among populations within regions; and FST: genetic variation among all populations. Significance (P) is the probability of finding a variance component and F-statistic that are greater than or equal to the observed values and was tested using a non-parametric approach (Excoffier et al. 1992), with at least 3,000 permutations of the dataset.