Fig. 2

Population structure analysis of the peanut varieties using the four different SNP panels. Based on the optimal K values, samples were classified into subgroups 6 and 7 with the optimized SNP panel PHR0301_Ah10K (a, b). In contrast, the SNP panels Arachis_hy02 (c) and Arachis_hy01 (d) grouped the samples into 6 subgroups, while the SNP panel Arachis_hy03 (e) categorized them into 7 subgroups.