Additional file 1: Figure S1. of Genome-wide introgression among distantly related Heliconius butterfly species

A maximum-likelihood phylogeny of 32 samples combined with dating of the nodes. Divergence times were calibrated using a fast Bayesian approach based on the separation time of melpomene and cydno-timareta clades (1.3 ± 0.1 Mya) and the separation time of H. pachinus from the cydno clade (0.4 ± 0.1 Mya). Samples from H. besckei and H. m. nanna are highlighted in red. Numbers are in million years and blue bars stand for 95 % confidence intervals. Figures S2-S9. Maximum-likelihood phylogenetic trees were constructed for all candidate introgression loci using original windows (5 kb, 10 kb and 50 kb), expanded windows (original 5 kb + 5 kb on either side, original 10 kb + 10 kb on either side) and multiple 10 kb windows within original 50 kb windows. The window size (as shown in each figure) may vary due to actual scaffold length and position. Figure S10. A maximum-likelihood phylogeny of Heliconius butterflies based on the SNP data from the Z chromosome. The cydno-timareta-melpomene clade is grouped with a subset of silvaniform species (highlighted in blue). (PDF 715 kb)