Phylogeny reconstruction
Phylogenies of rodents in phylogenetic analyses in this study were reconstructed using published DNA sequences downloaded from GenBank (http://www.ncbi.nlm.nih.gov/genbank/) (last accessed in July, 2018). We inferred the phylogeny using four mitochondrial DNA genes (Cytb, CoI, 12s-rRNA and 16s-rRNA) and three nuclear DNA genes (IRBP, GHR, and RAG1) (Fig. S2 and S3). DNA sequences that used into phylogeny reconstruction could be found in Table S1. Phylogenetic relationships among rodent species were estimated through Bayesian inference (BI) using MrBayes (version 3.2.5) (Ronquist et al. 2012). Parameter settings and other detailed information in phylogenetic reconstructions can be found in Du et al. (2017).