highly significantP ≤ 0.0001
ObStruct using Structure output at K = 2 and 8 sampling locations as predefined populations shows these to be strongly correlated ( R 2 = 0.39, P ≤ 0.0001) and using sampling locations with Structure output for K = 4 had a weaker correlation, though still highly significant ( R 2 = 0.27, P ≤ 0.0001).