Fig. 3: An increase in the strength of disruptive selection increases the tendency of the population to split, the intensity of split, and the likelihood of runaway selection.
From: Ecological disruptive selection acting on quantitative loci can drive sympatric speciation
At low values of strength of disruptive selection, the population does not split into two. As the strength increases, the likelihood of the population splitting increases, along with the intensity, as shown in a, b. But, as depicted in a, when the strength of disruptive selection increases, the population’s tendency to undergo runaway selection also increases. We check if (i) the IoS (SoDS = 1.67) < IoS (SoDS = 2.94), (ii) if IoS (SoDS = 2.94) < IoS (SoDS = 3.85), and (iii) if IoS (SoDS = 3.85) < IoS (SoDS = 5), using one-tailed t tests. The p values (one-tailed t test) obtained for all three tests are less than 0.001. Since these p values (one-tailed t test) obtained indicate statistical reliability, we conclude that IoS (SoDS =1.67) < IoS (SoDS = 2.94) < IoS (SoDS = 3.85) < IoS (SoDS = 5). The error bars indicate means ± standard deviations.
