USDA-MARC Swine Genome Map Marker Search There are over 1200 markers on the USDA-MARC Swine Genome Map. All marker information, including the experimental details, are hosted on an Oracle database server at USDA-MARC. You can search for related information using specific marker names Enter the marker name here: then press this button to: All markers are also displayed by their chromosomal locations on the USDA-MARC Swine Genome Map [an error occurred while processing this directive]