Subpopulation inference after Evanno et al. , default STRUCTURE model with a 10 k burn-in and 40 k MCMC replicates. A. Mean ln (X|K) (±SD) over 100 runs for each value of K. B. Rate of change of ln (X|K) (mean ± SD). C. Absolute value of the second order rate of change (mean ± SD). D. ΔK, mean of ln“(X|K) divided by standard deviation of ln (X|K). The modal value is the presumptive true number of subpopulation.