Figure 1. Estimated LnP(D) and ΔK over five repeats of STRUCTURE analysis.

(a) LnP(D) for k from 1 to 10 for 356 accessions. LnP(D) value of each hypothetical k kept increasing with k value and did not show any peak. (b) ΔK for k from 2 to 9 for 356 accessions. The Δk value showed a much higher likelihood at k = 2 than at k = 3–10, suggesting that the total panel should be divided into two major subpopulations.