The PIWI/piRNA response is relaxed in a rodent that lacks mobilizing transposable elements

(A) Z₁₀ score distribution among families among species. The dotted line reflects the position of a Z₁₀ score = 1.96, P = 0.05. Significant differences among species means (as determined by Tukey's HSD test, P < 0.05) are indicated by different shared letters. (B) Z₁₀ score distributions calculated from young insertions. (C) Number of young insertions plotted against the expression calculated from those insertions. Families are colored based on median K2P divergence, where young families are <10%, medium are between 10% and 20% diverged, and old families are >20%. Z₁₀ scores calculated from young insertions are reflected by the size of the point.