Table S1. Survey statistic results. Table S2. Sequencing data statistics. Table S3. Statistics of assembly results with only Illumina sequencing data. Table S4. Statistics of assembly results after extension with PacBio RS II data. Table S5. SSR primer used for identification of true F1 hybrids. Table S6. Statistical information of genetic linkage groups. Table S7. Coverage statistics of the I. trifida genome. Table S8. EST sequence evaluation results. Table S9. CEGMA evaluation results. Table S10. RNA-seq data used for annotation. Table S11. Statistical results of gene functional annotations. Table S12. Statistical results of non-coding RNAs. Table S13. Statistical results of repeated classification. Table S14. Summary of the plant species and assemblies/gene models used in this study. Table S15. Comparison of repeat contents between I. trifida and I. nil. Table S16. Statistics of LTR numbers. Table S17. Lengths of syntenic blocks and block repeat sequences. Table S18. Chromosome duplication test results for Y22. Table S19. KEGG enrichment results for the genes expanded in I. trifida. Table S20. KEGG enrichment results for the genes contracted in I. trifida. Table S21. Sequencing data statistics of RNA from S0 to S3. Table S22. KEGG pathways of upregulated genes. Table S23. Blast results of the specific protein sporamin in the I. trifida assembly. Table S24. KEGG pathways of downregulated genes. Table S25. QTL mapping results. Table S26. Results of BMY11 microarray hybridization during the process of SR development in sweetpotato var. Guangshu87. Table S27. Blast results of BMY11 in the full-length transcripts of sweetpotato var. Xushu18. Table S28. qPCR primers used to amplify BMY11. (DOCX 75 kb)