Frequency-Dependent Selection Predicts Patterns of Radiations and Biodiversity
Figure 2
In an evolutionary graph, individuals occupy the vertices of a graph. In each time step, an individual is selected with a probability proportional to its fitness. In the model without frequency-dependent selection, individuals are selected randomly. In the frequency-dependent selection model, individuals with few connections, and therefore with more rare alleles, have more success at mating and their alleles spread quickly through the population. The process is described by a symmetric genetic similarity matrix , where
denotes the genetic similarity between individual
and
. Dotted links represented by
in the
matrix denote the similarity values
, indicating reproductive incompatibility.