Fig. 4

Prevalence of non-deleterious and deleterious minor alleles per individual by ancestry proportion. The proportion of ancestry from Engelmann spruce is shown against the proportion of alleles at polymorphic loci that are non-deleterious minor alleles (a) the proportion of alleles at polymorphic loci that are deleterious minor alleles (b), the ratio of the proportion of alleles at polymorphic loci that are deleterious minor alleles to the proportion of alleles at polymorphic loci that are non-deleterious minor alleles (c), the proportion of polymorphic loci that are homozygous for a non-deleterious minor allele (d), the proportion of polymorphic loci that are homozygous for a deleterious minor allele (e) and the ratio of the proportion of polymorphic loci that are homozygous for a deleterious minor allele to the proportion of polymorphic loci that are homozygous for a non-deleterious minor allele (f). Lines in in (a) - (c) represent linear regressions and those in (d) - (f) represent quadratic regressions. Vertical colored bars represent 95% confidence intervals for the mean of each species groups (blue for pure white spruce, red for pure Engelmann spruce and purple for intermediate hybrid) and columns of the corresponding background colors indicate the range of individuals included in each species group. Note difference in Y-axis scale among panels, especially for deleterious and non-deleterious alleles