IView: introgression library visualization and query tool
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Updated: Jun 8, 2026

Identification of Functionally-Relevant Lentivirus Integration Sites in an Insertional Mutagenesis Cell Library
Published on: January 10, 2025
Christopher A Bottoms1, Sherry Flint-Garcia, Michael D McMullen
1Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA.
Background:
An introgression library is a family of near-isogenic lines in a common genetic background, each of which carries one or more genomic regions contributed by a donor genome. Near-isogenic lines are powerful genetic resources for the analysis of phenotypic variation and are important for map-base cloning genes underlying mutations and traits. With many thousands of distinct genotypes, querying introgression libraries for lines of interest is an issue.
Results:
We have created IView, a tool to graphically display and query near-isogenic line libraries for specific introgressions. This tool incorporates a web interface for displaying the location and extent of introgressions. Each genetic marker is associated with a position on a reference map. Users can search for introgressions using marker names, or chromosome number and map positions. This search results in a display of lines carrying an introgression at the specified position. Upon selecting one of the lines, color-coded introgressions on all chromosomes of the line are displayed graphically.The source code for IView can be downloaded from http://xrl.us/iview.
Conclusions:
IView will be useful for those wanting to make introgression data from their stock of germplasm searchable.
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