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Gramene Maps Database

Welcome to Gramene's Maps module where you can view genetic, physical, sequence, and QTL maps for many species of cereal crops. CMap — the Comparative Map Viewer — allows you to construct comparisons between different maps. All data (map sets, maps, features, and correspondences) in the Maps Module are built from the Markers Module. Users are encouraged to consult the Markers Module for primary information about markers and their mappings. The Maps Module should be considered to be primarily a visualization tool

Search or Browse Options

MapsBrowse, View and compare maps
Map SearchSearch for a map by name
Feature SearchFind a particular feature by name or accession number
MatrixSee the number of correspondences among all maps
Entry PointsBrowse useful pre-computed CMap views organized by species


Map SetsGet a description of one or all map sets
Feature TypesBrowse the feature types and their descriptions
Map TypesRead descriptions of the different map types
Evidence TypesGet a description of the correspondence evidence types
SpeciesGet a description of the species
HelpPresents an overview on how to use the Comparative Mapping database tool and lists explanations of field names.
TutorialMore in-depth than the help pages, use the tutorial for an exaple of using the database, see how it integrates other datasets, and get tips to increase your data search efficiency.
FAQsFrequently Asked Questions - see what questions users have asked, and get the developers answers.
Release NotesFor more information about the most recent release.

Collaborative Projects


The Comparative Maps are maps that only contain features with comparisons to other maps. This data can be downloaded in bulk from our ftp site. For original maps with all their features, see the Markers module.


Gramene uses CMap. GMOD's CMap - CMap is a web-based tool that allows users to view comparisons of genetic and physical maps. The package also includes tools for curating map data. For a list of data contributors, please see Collaborators and Contributors.