TASSEL 5.0                                 

TASSEL Version 5.0   (Getting Started!)
(Build: December 21, 2023 Requires: Java 1.8)

TASSEL Version 5.0 Standalone
(GBS Pipeline V2 - Preferred Version)

Archived Versions of TASSEL

TASSEL Documentation

TASSEL Pipeline Documentation

TASSEL development has been generously supported by the USDA-ARS and the NSF, as well as free or reduced cost tools including:

Contacts
We recommend first searching the archives and posting
questions on the discussion group

Tassel User Group (tassel@googlegroups.com)

Software Architect
Terry Casstevens (tmc46@cornell.edu)

Analysis Tools / MLM / GLM
Peter Bradbury (pjb39@cornell.edu)

Overall Project Lead
Ed Buckler (esb33@cornell.edu)

Bradbury PJ, Zhang Z, Kroon DE, Casstevens TM, Ramdoss Y, Buckler ES. (2007) TASSEL: Software for association mapping of complex traits in diverse samples. Bioinformatics 23:2633-2635.

TASSEL is a software package to evaluate traits associations, evolutionary patterns, and linkage disequilibrium. Strengths of this software:

1. It provides a number of new and powerful statistical approaches to association mapping such as a General Linear Model (GLM) and Mixed Linear Model (MLM). MLM is an implementation of the technique which our recently published Nature Genetics paper - Unified Mixed-Model Method for Association Mapping - which reduces Type I error in association mapping with complex pedigrees, families, founding effects and population structure.

2. Ability to handle a wide range of indels (insertion & deletions). Most software package ignore this type of polymorphism, however, in some species (like maize) this is the most common type of polymorphism.