PopLDdecay

PopLDdecay computes linkage disequilibrium (LD) decay directly from variant call format (VCF) files to quantify non-random allele associations and characterize LD decay patterns in population genetics studies.

Key Features:

• Direct VCF File Processing: Processes VCF files without requiring intermediate steps that generate large pair-wise LD measurement files.
• Scalability and Speed: Handles large numbers of variants derived from sequencing data, including whole-genome single nucleotide polymorphisms (SNPs), to support rapid analysis.
• Storage Efficiency: Avoids exporting pair-wise LD measurement results to conserve storage space.
• Subgroup Analysis Support: Provides functionality for analyses within specific population subsets or genomic regions.
• LD Decay Metric Computation: Computes LD decay metrics to quantify how linkage disequilibrium decreases with genomic distance.

Scientific Applications:

• Evolutionary Inference: Infers historical recombination events and patterns affecting LD decay across genomes.
• Genetic Architecture Characterization: Assesses LD decay to inform the distribution of linkage around causal variants and marker density requirements.
• Association Mapping Support: Aids identification of genetic markers associated with traits by characterizing local LD structure.
• Population Structure and Selection Analysis: Provides insights into population structure and potential selection pressures via LD decay patterns.

Methodology:

Uses algorithms to compute LD decay metrics directly from VCF files while avoiding generation or exportation of pair-wise LD measurement files.