of a genome project, and (c) intergenome comparison between related strains when only one of the strains has been sequenced and a large insert library is available for the other.  ...  This new tool has been applied to numerous genome projects to solve various problems including (a) validation of whole genome shotgun assemblies, (b) support for contig ordering in the finishing phase  ...  These virtual clone maps have been demonstrated to be versatile, not only for the validation of an assembly and the comparison of related strains, but also for the integration of other genomic data such  ...