3.1 Whole-genome resequencing, mapping, and SNP detection
The genome size was 836,201,995 bp, and individual genomes were
sequenced to an average of 7× coverage, with the average coverage of
90% (Supporting information Table S1, S2). A total of 31,759,600 SNP
markers were initially obtained from Shunchang, whereas 29,918,163 SNPs
were obtained from Xiapu. After stringent filtering, 4,152,751 SNPs were
identified from Shunchang and 3,298,993 from Xiapu. The filtered SNPs
were used for subsequent analysis.