GGT2 – Graphical Genotypes Software Tutorial


Nancy Huarachi Morejon, The Ohio State University

The attached tutorial teaches users how to download and install GGT2 software. In addition, the tutorial introduces users to basic GGT2 capabilities.


Graphical genotyping using software such as GGT2 allows breeders to visualize the genotype of individuals and populations. Creating graphical genotypes can help breeders identify desirable individuals based on their genotype. The tutorial teaches users how to download GGT2 software, install GGT2 software, import or enter genotypic and map data, sort data, and identify desired genotypes.

In the event that the slideshare tutorial does not work, the tutorial is also attached as a pdf at the bottom of the page.

References Cited

  • Van Berloo, R. 1999. GGT: Software for the display of graphical genotypes. Journal of Heredity 90: 328–329. (Available online at: (verified 30 Aug 2012).
  • Van Berloo, R. 2008. GGT 2.0: Versatile software for visualization and analysis of genetic data. Journal of Heredity 99(2):232-236. (Available online at: (verified 30 Aug 2012).
  • Young, N. D., and S. D. Tanksley. 1989. Restriction fragment length polymorphisms maps and the concept of graphical genotypes. Theoretical and Applied Genetics 77(1): 95-101. (Available online at: (verified 30 Aug 2012).

External Links

Funding Statement

Development of this lesson was supported in part by the National Institute of Food and Agriculture (NIFA) Solanaceae Coordinated Agricultural Project, agreement 2009-85606-05673, administered by Michigan State University. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the United States Department of Agriculture.


GGT2 tutorial.pdf (2.87 MB)

PBGworks 921