Additional file 4.

Estimated number of clusters obtained with STRUCTURE for K values from 1 to 20 using SNP data. Graphical representation of (a) estimated mean L(K) and (b) its derivative statistics ΔK. (c) Table summarizing parameters of different STRUCTURE simulations performed for each preset K: mean likelihoods of models, mean similarity coefficients, clusteredness, and their standard deviations, ΔK and significance of Wilcoxon test.

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Emanuelli et al. BMC Plant Biology 2013 13:39   doi:10.1186/1471-2229-13-39