Figure 4

Heatmap of Gene Identity Matrix. Each ‘pixel’ on the diagonal corresponds to the gene identity within an infrapopulation. Each ‘pixel’ on the off-diagonal corresponds to the gene identity between two infrapopulations. Rows and columns are ordered using the results from K-means clustering with K = 5. VdR = Volta do Rio, C4 is a subgroup of infrapopulations sampled in São Bartolomeu and C5 is a subgroup of infrapopulations sampled in Jenipapo. The arrow identifies a block of increased gene identity between infrapopulations in C4 and C5.