Figure 6. Mean absolute within-group nucleotide diversity (!") of allopatric yellowhammers (n = 53) and allopatric pine buntings (n =42) plotted against absolute between-group nucleotide diversity (!!). Each dot represents the average value taken from a 2000 bp window of sequenced data across the nuclear genome. The black line indicates where mean within-group nucleotide diversity equals between-group nucleotide diversity. Increasing values of relative differentiation (FST) calculated for each window are shown in darker shades of blue.
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