A Japanese variety, ‘Reikou’, and its progeny (S1) were subjected to genome sequencing as representatives of F. x ananassa. ‘Reikou’ was bred in the Chiba Prefectural Agriculture and Forestry Research Center. Like other strawberry varieties, ‘Reikou’ maintains heterozygosity in the genome. The S1 progenies were sequenced for SNP discovery within ‘Reikou’ for further analysis (data were not shown in this study). A total of 20 wild Fragaria species with a diverse range of polyploidy were used in phylogenetic analyses with SSR markers (Supplementary Table S1 ). Along with the 20 wild species, the following four Japanese F. x ananassa varieties were subjected to the phylogenic analysis: ‘Reikou’, ‘Hokowase’, ‘Sachinoka’, and ‘Akihime’. Whole-genome sequencing was subsequently performed for four wild species, F. iinumae, F. nipponica, F. nubicola, and F. orientalis. The genomic DNA was extracted from young leaves using a DNeasy Plant Mini Kit (Qiagen, Inc., CA, USA). DNA quantification and quality checks were performed using a Nanodrop ND1000 spectrophotometer (Nanodrop Technologies, DE, USA) and 0.8% agarose gel electrophoresis, respectively.
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