Identifications of the 30 putative wolf x dog hybrid samples used in this study.

aID = sample identification number.bY = year of sampling.cOh = phenotype traits.dCR = mtDNA control region haplotypes.eY-STR = Y-linked STR haplotypes detected in males.fK = melanistic deletion at the β-defensin CBD103 gene:+ = homozygote wild-type (no deletion), B = heterozygote for the KB melanistic deletion.gand h Structure = individual proportion of assignment in Structure admixture analyses to the Italian wolf cluster with 39, 24 and 12 microsatellites, with option usepopinfo not activated (popinfo = 0) or activated (popinfo = 1).iGeneClass = probability of assignment to a distinct cluster (admixed genotypes) with 39, 24 and 12 microsatellites performed in GeneClass.jFlock = assignment obtained through the non-Bayesian clustering procedure implemented in Flock to an Italian wolf (W) or hybrid (HY) cluster.kBaps = assignment to an Italian wolf (W) or an admixed (HY) cluster with 39 microsatellites as inferred using Baps.lNH = assignment to parental Italian wolf (W), F1, F2 or first generation backcross (BC) genotypic classes obtained with NewHybrids.mID = final identification of each sample as a likely F1, F2, backcross (BC), introgressed (IG) or false admixed (FP) genotype, based on a qualitative consensus of all the probabilistic admixture analyses.