N , number of individuals; polymorphic loci, the percentage of loci that are polymorphic out of total 1654 loci; N a, observed number of alleles; N e, effective number of alleles; I , Shannon’s information index; H e, expected heterozygosity.
NX, Ningxia; NMG, Neimenggu; SX, Shaanxi. GS, Gansu.
Table S2 Localities of 155 records used for niche modeling