Fig. 2From: Long-term experimental evolution reveals purifying selection on piRNA-mediated control of transposable element expressiona Heatmap of expression of individual TE elements across different lines. TEs with significant differences in expression between different population size treatments are shown. b Heatmap illustrating the significance in correlation in expression between different TEs across all the MA lines. The colour intensity shows the significance of Spearman’s rank correlation coefficient with blue showing a negative correlation and orange a positive correlationBack to article page