The performance of assembly as increasing coverage depths. The performance of assembled contigs (A), N50 size (B) and total bases (C) for the three NGS technologies at increasing depths in simulation. The red line, green line and blue line show the performance of Roche 454, Illumina GAIIx, and ABI SOLiD platform, respectively. Reads from each platform were simulated by random subsampling. Summary of performance of each platform, 25×, 240× and 300× sequencing data generating from 454, GAIIx and SOLiD platforms was sufficient for de novo assembly.