Fig. 4From: Long-term experimental evolution reveals purifying selection on piRNA-mediated control of transposable element expressionRelationship between TE copy-number and expression in MA lines. a Increase in TE copy-number is associated with stronger genetic drift (weaker selection). Data shows mean of TE copy-number across all TEs normalized to the mean across all lines. b Correlation between total change in TE copy-number across all TEs and total TE expression. c Lack of correlation between Turmoil2 RNA levels and copy-number changes in MA linesBack to article page