Plant & Animal Genomes XIV Conference

January 14-18, 2006
Town & Country Convention Center
San Diego, CA

GGT: A Swiss Army Knife For Molecular Marker Data

Ralph v Berloo , Fred v Eeuwijk

  Laboratory of Plant Breeding, Wageningen University, PO box 386, NL-6700AJ Wageningen, The Netherlands

The software tool GGT (Graphical Genotyping) has evolved from its initial release as a data visualisation tool in 1999¹ to a versatile tool for the visualisation and analysis of marker data. Added features in the 2006 release of GGT are:

• Visualisation of QTLs


• Filtering & selection of genotypes based on marker criteria


• Calculation of inter marker LD


• Calculation of genetic distances and marker-trait associations


• Sorting of genotypes based on marker or trait-values


• and much more...

Data exchange, import and export has been greatly improved. GGT now allows data import from either the GGT/Locus textual file format or from Excel spreadsheets, but also export to Excel, MEGA and Mapchart is supported in the latest release.

GGT is used by a growing global user community and has been included in the 'recommended software tools' package by the Generation Challenge program. GGT runs under Microsoft Windows only.

For more information on GGT please visit the website of the Wageningen University; Laboratory of Plant Breeding: www.pbr.wur.nl | www.dpw.wau.nl/pv/

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¹ GGT: Software for the display of graphical genotypes Journal of Heredity 90 (1999) p. 328-329.