Fig. 5

Relationship between TEs and piRNAs in mammalian oocytes. A Bar plot showing the 30 most abundant TE-derived piRNAs in the 12 vertebrate species. Each dot represents a TE subfamily. Color indicates the divergence rate from the consensus sequence; red indicates a lower divergence rate and blue indicates a higher divergence rate. The size of each dot indicates the Z-score of the ping-pong signature. B Heatmap of Pearson’s correlation coefficients between TE mRNA levels and three other variables: piRNA abundance, TE divergence rate, and TE copy number. TE, expressed levels of TE mRNAs; Div, average divergence of TE families; Copies, total copy number of TE families in the genome. C Heatmap of Pearson’s correlation coefficients between piRNA abundance and three other variables (TE mRNA levels, TE divergence rate, and TE copy number). Red indicates a positive correlation and blue indicates a negative correlation