Comparison of the period ratios after 100 Myr for different planet populations. The black solid line denotes the distribution for Kepler planet candidates (data taken from www.exoplanets.org), the red dashed line for the reference population (R), the blue dot-dashed line for the population with 20 intial embryo seeds (E20), and the cyan dotted line for the population with five initial embryo seeds (E5).