Figure 4

Number of base substitutions per site (p-distance) from between sequences belonging to five superfamilies of NLTR elements. See Figure 3 for detailed information. a) and b) CR1 superfamily: full length (four families) and fragmented sequences (16 families), respectively; c) I elements (one full length family); d) and e) Jockey superfamily, full length (three families) and fragmented sequences (two families), respectively; f) and g) Outcast superfamily, full length (two families) and fragmented sequences (one family), respectively; h) and i) RTE superfamily, full length (two families) and fragmented sequences (one family), respectively. We tested the significance of the difference between families containing full-length sequences and those containing only truncated sequences. Kruskal-Wallis test: p-value < 0,001. Ad hoc, Tukey non-parametric test. p-values: a–b = ns; d–e**; h–i*. P-value: ns = not significant; * < 0.05; ** < 0.001.