Figure 2

Distribution of minor allele frequencies of SNPs identified for channel catfish, blue catfish and inter-species, as derived from analysis of sequence tags from the Illumina sequencing. A: Intra-specific SNPs in channel catfish; B: Intra-specific SNPs in blue catfish and C: Inter-specific SNPs between the two species. The X-axis represents the SNP sequence derived minor allele frequency in percentage, while the Y-axis represents the number of SNPs with given minor allele frequency. Note that the majority of SNPs have minor allele frequencies more than 15%.