Maximum-likelihood (ML) phylogenetic tree of Solanum melongena and the other 12 Solanum species using whole chloroplast genome sequences. Capsicum annuum was served as outgroup. The numbers on each node show the ML bootstrap support values. The accession numbers are as below: Solanum bulbocastanum (NC_007943), Solanum cheesmaniae (NC_026876), Solanum chilense (NC_026877), Solanum commersonii (NC_028069), Solanum galapagense (NC_026878), Solanum habrochaites (NC_026879), Solanum lycopersicum (NC_007898), Solanum neorickii (NC_026880), Solanum nigrum (NC_028070), Solanum peruvianum (NC_026881), Solanum pimpinellifolium (NC_026882), Solanum tuberosum (NC_008096), Capsicum annuum (NC_018552).