Plot of introgression patterns for 29 markers (24 microsatellites, 1 nuclear gene, 2 mitochondrial genes, and 2 z-linked genes). Each column represents a marker and each row represents an individual (allopatric individuals are not included). Colors correspond to parental alleles: 2 nelsoni alleles (white), 2 caudacutus alleles (black), and 1 allele from each parental population (grey). (PDF 74Â kb