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Introgression browser: high-throughput whole-genome SNP visualization.

Saulo Alves Aflitos1, Gabino Sanchez-Perez, Dick de Ridder

  • 1Applied Bioinformatics, Wageningen University and Research Centre (WUR), Wageningen, The Netherlands.

The Plant Journal : for Cell and Molecular Biology
|February 24, 2015
PubMed
Summary
This summary is machine-generated.

The Introgression Browser (iBrowser) tool visualizes genetic introgressions with nucleotide accuracy, overcoming limitations of traditional marker-assisted selection. This bioinformatics solution aids in crop breeding by precisely identifying introgressed DNA segments.

Keywords:
ArabidopsisSNPVariant Call Formatintrogressionphylogenomicstechnical advancetomato

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Area of Science:

  • Genetics
  • Bioinformatics
  • Plant Breeding

Background:

  • Introgressive hybridization broadens crop genetic diversity but identifying introgressed traits can be challenging.
  • Marker-assisted selection struggles with rare or non-viable crossover recombinants in specific chromosome regions.

Purpose of the Study:

  • To introduce the Introgression Browser (iBrowser), a novel bioinformatics tool for visualizing genetic introgressions.
  • To enable accurate identification and boundary determination of introgressed segments at nucleotide or Single Nucleotide Polymorphism (SNP) resolution.

Main Methods:

  • iBrowser processes Variant Call Format (VCF) data, selecting homozygous SNPs while filtering heterozygous SNPs, multi-nucleotide polymorphisms (MNPs), and insertion-deletions (InDels).
  • The tool utilizes sliding windows for analysis and supports custom fragmentation patterns via General Feature Format (GFF) information.
  • Demonstrated utility with examples in tomato (Solanum lycopersicum) and Arabidopsis accessions, including alien DNA identification and structural variation analysis.

Main Results:

  • Successfully visualized SNP patterns and defined introgression boundaries in tomato accessions.
  • Identified alien DNA in S. pimpinellifolium by analyzing phylogenetic relationships of introgressed segments.
  • Detected boundaries of a large SNP-free inverted segment in Arabidopsis, showcasing iBrowser's capability with large datasets and complex genomic structures.

Conclusions:

  • iBrowser provides high-resolution visualization of genetic introgressions, enhancing crop breeding strategies.
  • The tool is versatile for SNP mining, genome structure analysis, and pedigree analysis.
  • iBrowser's efficient data processing and visualization capabilities make it a valuable asset for modern plant breeding programs.