Skip to content

Identity by State (IBS)

Definition
AI-generated

Two alleles are identical by state (IBS) if they have the same nucleotide (or same coded genotype) at a marker, regardless of whether they were inherited from a common ancestor.

Topics
Population genetics
Related
Identity by Descent (IBD) IBS0 Kinship Coefficient

Why it matters in GWAS

Relationship algorithms (e.g. PLINK/KING) use IBS allele-sharing proportions to estimate kinship; high IBS can reflect relatedness or, at a single SNP, chance agreement for common alleles.

Example usage

"The methods include Identity by State (IBS) to support interpretation of the main results."

Identity by Descent (IBD) IBS0 Kinship Coefficient PI_HAT Single Nucleotide Polymorphism (SNP)
Related-term network

Click any node to open that term page.

Node order. The current term is first. Next come every page linked from Related terms, in the same top-to-bottom order as that list. Then new terms appear in two-hop layers: for each of those direct neighbors (in that same order), their related terms are appended if not already listed. A third pass does the same for two-hop nodes. The walk stops when a fixed maximum number of nodes is reached.

References

← Identity by Descent (IBD) Sequencing by synthesis (SBS) →

Last updated (UTC · Git history)