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Related Experiment Video

Updated: Jun 24, 2026

Infinium Assay for Large-scale SNP Genotyping Applications
13:33

Infinium Assay for Large-scale SNP Genotyping Applications

Published on: November 19, 2013

A strategy for QTL fine-mapping using a dense SNP map.

Joaquim Tarres1, François Guillaume, Sébastien Fritz

  • 1UR337 Station de Génétique Quantitative et Appliquée, INRA, Jouy-en-Josas F-78350, France. joaquim.tarres@dga.jouy.inra.fr

BMC Proceedings
|March 13, 2009
PubMed
Summary
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This study developed a fast statistical method for quantitative trait loci (QTL) fine mapping using linkage and linkage disequilibrium analysis. The method efficiently identified significant QTL with additive effects in simulated data.

Area of Science:

  • Genetics
  • Bioinformatics
  • Statistical Genomics

Background:

  • Dense marker maps necessitate efficient statistical methods for quantitative trait loci (QTL) fine mapping.
  • Accurate QTL fine mapping is crucial for genetic studies with large marker datasets.

Purpose of the Study:

  • To evaluate a novel statistical strategy for QTL fine mapping.
  • To assess the efficiency of combining linkage and linkage disequilibrium (LD) analysis for QTL detection.

Main Methods:

  • Utilized a simulated dataset from the XIIth QTLMAS workshop.
  • Employed variance component linkage analysis to establish confidence intervals for QTL.
  • Applied two methods within confidence intervals: identity-by-descent (IBD) and identity-by-state (IBS) haplotype clustering.

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QTL Mapping and CRISPR/Cas9 Editing to Identify a Drug Resistance Gene in Toxoplasma gondii
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QTL Mapping and CRISPR/Cas9 Editing to Identify a Drug Resistance Gene in Toxoplasma gondii

Published on: June 22, 2017

Targeted DNA Methylation Analysis by Next-generation Sequencing
08:38

Targeted DNA Methylation Analysis by Next-generation Sequencing

Published on: February 24, 2015

Related Experiment Videos

Last Updated: Jun 24, 2026

Infinium Assay for Large-scale SNP Genotyping Applications
13:33

Infinium Assay for Large-scale SNP Genotyping Applications

Published on: November 19, 2013

QTL Mapping and CRISPR/Cas9 Editing to Identify a Drug Resistance Gene in Toxoplasma gondii
11:37

QTL Mapping and CRISPR/Cas9 Editing to Identify a Drug Resistance Gene in Toxoplasma gondii

Published on: June 22, 2017

Targeted DNA Methylation Analysis by Next-generation Sequencing
08:38

Targeted DNA Methylation Analysis by Next-generation Sequencing

Published on: February 24, 2015

Main Results:

  • Identified significant QTL on chromosomes 1, 2, 4, and 5, explaining varying percentages of genetic variance.
  • The most significant QTL were detected on chromosome 4 (37% variance) and chromosome 5 (13.6% variance).
  • A less impactful QTL was found on chromosome 3 (5% variance).

Conclusions:

  • The combined linkage and LD analysis strategy efficiently detected major additive QTL.
  • The method demonstrated speed and effectiveness for QTL fine mapping.
  • Future extensions should aim to fine-map linked and epistatic QTL.