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  2. Association mapping - Wikipedia

    en.wikipedia.org/wiki/Association_Mapping

    In genetics, association mapping, also known as "linkage disequilibrium mapping", is a method of mapping quantitative trait loci (QTLs) that takes advantage of historic linkage disequilibrium to link phenotypes (observable characteristics) to genotypes (the genetic constitution of organisms), uncovering genetic associations. [1] [2]

  3. Linkage disequilibrium score regression - Wikipedia

    en.wikipedia.org/wiki/Linkage_disequilibrium...

    In statistical genetics, linkage disequilibrium score regression (LDSR [1] or LDSC [2]) is a technique that aims to quantify the separate contributions of polygenic effects and various confounding factors, such as population stratification, based on summary statistics from genome-wide association studies (GWASs).

  4. Linkage disequilibrium - Wikipedia

    en.wikipedia.org/wiki/Linkage_disequilibrium

    Once linkage disequilibrium has been calculated for a dataset, a visualization method is often chosen to display the linkage disequilibrium to make it more easily understandable. The most common method is to use a heatmap, where colors are used to indicate the loci with positive linkage disequilibrium, and linkage equilibrium. This example ...

  5. Genome-wide association study - Wikipedia

    en.wikipedia.org/wiki/Genome-wide_association_study

    In 2018, several genome-wide association studies are reaching a total sample size of over 1 million participants, including 1.1 million in a genome-wide study of educational attainment [39] follow by another in 2022 with 3 million individuals [40] and a study of insomnia containing 1.3 million individuals. [41]

  6. Tag SNP - Wikipedia

    en.wikipedia.org/wiki/Tag_SNP

    Over time, a pair of markers or points on a chromosome in the population move from linkage disequilibrium to linkage equilibrium, as recombination events eventually occur between every possible point on the chromosome. [1] Two loci are said to be in linkage equilibrium (LE) if their inheritance is an

  7. Genetic association - Wikipedia

    en.wikipedia.org/wiki/Genetic_association

    Genetic association is when one or more genotypes within a population co-occur with a phenotypic trait more often than would be expected by chance occurrence.. Studies of genetic association aim to test whether single-locus alleles or genotype frequencies or more generally, multilocus haplotype frequencies differ between two groups of individuals (usually diseased subjects and healthy controls).

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