Number of candidate SNP markers involved in S. maximus linkage mapping.

Where lm×ll means SNPs are heterozygous in maternity (lm) and homozygous in paternity (ll); nn×np means SNPs are homozygous in maternity (nn) and heterozygous in paternity (np); These two types of SNPs are used for maternal and paternal linkage mapping respectively, and SNPs that are heterozygous in both maternity and paternity (hk) are labelled as “bridge” for the final consensus linkage mapping.Number of candidate SNP markers involved in S. maximus linkage mapping.