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. 2022 Oct 7;13:970314. doi: 10.3389/fgene.2022.970314

FIGURE 3.

FIGURE 3

Per-site estimates of (A) nucleotide diversity (π), (B) Waterson’s θ, (C) Tajima’s D test statistics for nuclear (box plots) and mitochondrial genomic data (red stars), (D) Z-scores and D-statistics for ABBA-BABA comparisons between populations with M. leidyi as an outgroup for nuclear genomes, (E) Cartoon tree represents hypotheses to test whether population 3 (P3) shared more ancestral versus derived alleles with population 1 (P1) relative to population 2 (P2). Positive-shifted histograms (excess of ABBA) represent significant gene flow between P2 and P3, negative-shifted histograms (excess of BABA) for significant gene flow between P1 and P3. Arrows on tree cartoons indicate gene flow between populations. Stars indicate significant z-scores > three standard deviations from zero. (F) Box plots of the first PCA axis of nuclear genomes for each population mapped to M. leidyi for 14,396 polymorphic sites that represented 36% of variation. Populations colored by locality: Friday Harbor (WA, green), the Monterey Bay area (NorCal, blue) and San Luis Obispo–Channel Islands, CA (SoCal, light blue).