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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: Divergence with gene flow across a speciation continuum of Heliconius butterflies

Fig. 4

Relative genomic divergence across the red color pattern (D) interval and unlinked loci. Sliding window (15-kb window size, 5-kb step size) relative genomic divergence across the red (D) interval and genomic regions unlinked to color pattern. The box on the x-axis indicates the previously identified 65-kb functional region modulating red color pattern variation [31]. See Table S2 for the taxa pairs included in each comparison, samples sizes, and estimates of baseline divergence from intervals unlinked to color pattern. a Parapatric comparisons show elevated divergence between the incipient species (solid line) at the color pattern locus and loci unlinked to color pattern. The within species comparisons between divergent taxa show a large peak of divergence at the functional region and low baseline divergence (dotted-dashed line). The within species comparisons between taxa with identical red phenotypes show low divergence throughout, with no discernable peaks of divergence (dotted line). b The allopatric within species comparisons show peaks of divergence at the functional region between both divergent taxa and mimetic taxa, with the rayed versus rayed comparison (dashed line) showing much smaller peaks

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