Related Experiment Video
Updated: Aug 8, 2026
13:55
Combined Immunofluorescence and DNA FISH on 3D-preserved Interphase Nuclei to Study Changes in 3D Nuclear Organization
Published on: February 3, 2013
Methods for multipoint disease mapping using linkage disequilibrium
1Department of Ecology and Evolution, State University of New York, Stony Brook, USA. brannala@ualberta.ca
Genetic Epidemiology
|October 31, 2000
Summary
Linkage disequilibrium (LD) aids in mapping disease mutations. This study introduces a new composite likelihood (CL) method for multipoint LD mapping, improving accuracy by better accounting for statistical dependencies.
Area of Science:
- Genetics
- Statistical genetics
- Bioinformatics
Background:
- Disease-associated mutations initially exhibit complete linkage disequilibrium (LD) with nearby genetic markers.
- Linkage disequilibrium mapping is a powerful tool for high-resolution localization of disease-causing mutations.
- Multipoint LD mapping, considering multiple linked markers, presents computational challenges for maximum likelihood approaches.
Purpose of the Study:
- To explore the relationships among existing composite likelihood (CL) methods for multipoint LD mapping.
- To propose an improved CL method for multipoint LD mapping that better handles statistical dependencies among marker loci.
Main Methods:
- Review and analysis of existing composite likelihood (CL) methods for multipoint LD mapping.
- Development of a novel CL method designed to account for statistical dependencies among marker loci more effectively.
Main Results:
- The study elucidates the connections between various CL methods used in multipoint LD mapping.
- A new CL method is presented, offering a more nuanced approach to statistical dependencies in marker data.
Conclusions:
- Composite likelihood methods offer a viable strategy for simplifying complex multipoint LD mapping problems.
- The proposed alternative CL method provides a more statistically robust framework for disease gene mapping using LD.
More Related Videos
Related Concept Videos
01:18Dihybrid Crosses
Overview
01:43Sex Linked Disorders
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
01:05Single Nucleotide Polymorphisms-SNPs
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
01:11Genome-wide Association Studies-GWAS
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
01:29Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...