Figure 1
(A) Sample size and distributions of samples. (B) PCA and (C) ADMIXTURE assignments of sampled Mexican ducks, mallards, and putative hybrids, based on 12,696 bi-allelic ddRAD-seq nuclear SNPs. Numbered parentheses refer to different sample sites within the genetic cluster. Note that these analyses were based on 370 samples that excluded domestic mallards (Supplementary Materials Fig. S2) and all but one representative of each identified sibling group (Supplementary Materials Fig. S3). Finally, (D) a haplotype network based on 628 sequenced base-pairs of the mitochondrial control region. Note that we identify mallards by origin (wild vs. domestic) and Mexican ducks by geographical location in PCA and mitochondrial haplotype network, whereas assignment probabilities are colored by the six genetic clusters as estimated with ADMIXTURE.
