View and edit molecular marker data with this tool. GGT (Graphical GenoTypes) is a graphical representation of molecular marker data can be an important tool in the process of selection and evaluation of plant material. A computer program was developed that enables representation of molecular marker data by simple chromosome drawings in several ways. Commonly used marker file types that contain marker information serve as input for this program, which was named 'GGT'. Besides representation, GGT can also be used for selection or filtering and much more.

Input data
GGT requires input in the form of GGT data files (or a spreadsheet, see further on). GGT data files are derived from two sources of data: A locus file, containing marker names and raw marker scores and a (linkage) map file, specifying marker positions on a linkage map.

Building GGT files from locus and map data
Usually, marker data will be present in the form of a single locus file, containing raw marker data. This data is then used for mapping and subsequently split into several separate files, one for each chromosome/ linkage group.

The license of this software is Freeware, you can free download and free use this graphing software.