Evolutionary models estimated for Del retrotransposon groups calculated using the likelihood ratio test.

Only significant models are shown, for groups with non significant models see Table S2.
anumber of sequences in the alignment used to reconstruct the trees.
bnumber of sequences considered for the likelihood ratio test analysis.
cnumber of codons in the alignment used to reconstruct the tree.
dnumber of codons used in the likelihood ratio test analysis.
emean and standard deviation of the effective number of codons.
fdN/dS estimates assuming a single dN/dS ratio per element.
gEstimated proportion of codons under purifying selection.
hdN/dS estimates assuming neutral evolution.
iEstimated proportion of codons under neutral evolution.
jLog likelihood of model.
kThe likelihood ratio statistic (2Δl) is approximated by the X2 distribution. Test of M1a vs M0 (line M1a; df = 1) or test M2a vs M1a (line M2a; df = 2).
**: P<0.001.
-: not available.