Table 1 Summary statistics and maximum likelihood model parameters for gene regions. Ten individuals were sampled from each of the three populations, and the same individuals were sequenced for all genes. For nuclear loci, one or two sequences per individual was obtained via cloning of diploid genes. To investigate introgression, paired datasets for sympatric H. cydno and H. melpomene only from Panama (10 individuals each) were analysed using the IM Bayesian algorithm [18]; these are the IM dataset, and IM reduced datasets 1 and 2 – the latter have been purged of presumably recombinant sequences by deleting some individuals and by sampling from 5' or 3' regions of each gene (see methods). Complete alignment data in FASTA format and IM data file format are given in [Additional file 2 ].

From: Polyphyly and gene flow between non-sibling Heliconius species