Variant Calling
Variant calling is a bioinformatics process used to identify genetic variations, such as single nucleotide polymorphisms (SNPs), insertions, deletions,CNVs, and structural variants, from sequencing data like DNA or RNA. It involves comparing aligned sequencing reads to a reference genome to detect differences, which are then filtered and annotated for biological significance. This technique is fundamental in genomics for applications like disease research, population genetics, and personalized medicine.
Developers should learn variant calling when working in bioinformatics, genomics, or healthcare data analysis, as it's essential for interpreting genetic data in research and clinical settings. It's used in cancer genomics to identify tumor mutations, in rare disease diagnosis to find causative variants, and in agricultural genomics for trait improvement. Mastery enables building pipelines for large-scale genomic studies and integrating with tools like GATK or bcftools.