Fig. 4
From: Genome-wide introgression among distantly related Heliconius butterfly species
Signatures of introgression between H. besckei and H. m. nanna along four candidate introgression loci. For each candidate locus, the Patterson’s D-statistic, f d and dxy scans are performed and the maximum likelihood phylogenetic tree using 10 kb window size is constructed to infer the timing and direction of gene flow