*2.3. Population Structure Analysis*

A principle coordinate analysis (PCoA) was conducted using the software GenAlEx V6.503 [53,54]. The population structure of 384 peanut accessions was evaluated by Structure v2.3.4 software (https://web.stanford.edu/group/pritchardlab/structure\_software/ release\_versions/v2.3.4/html/structure.html) under the admixture model. We compared the structures following the same parameters with K-values ranging from 1 to 10, and 20,000 Markov chain Monte Carlo iterations after a burn-in period of 10,000 iterations were carried out for three independent runs per K value. To make a decision for the optimum number for K, the delta K (ΔK) method used the software online "harvester structure".
