3.1 | nrITS and cpDNA datasets
For the samples of 2016, the ITS1/2 sequence matrix comprised 701 bp in total, harbored 13 polymorphic sites (S ) and 10 ribotypes (Nn ) from 176 samples (Table 2). At the species level, the ITS1/2 nucleotide diversity (π ) was 0.00435, the average number of nucleotide differences (Nd ) was 2.988, and haplotype diversity (h ) was 0.809 (Table 2). The geographical distribution of ribotypes showed that R1, R5, and R6 occurred in more than one population. R1 ribotype was shared by BW, YJ, EX, and QX, R5 was shared by QX and WZ, and R6 was shared by YG, WZ, and XA. The other seven ribotypes were private (Table 3; Figure 1a).