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	IBD-kartläggning	F-statistik (FST)
Ämnesområde	Genetik	Genetik
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1987	1951
Upphovsperson	Eric Lander & David Botstein	Sewall Wright
Typ	Genomic mapping method	Population differentiation measure
Ursprungskälla	Lander, E. S., & Botstein, D. (1987). Homozygosity mapping of autosomal recessive disorders in consanguineous families. American Journal of Human Genetics, 36(3), 537–551.	Wright, S. (1951). The genetical structure of populations. Annals of Eugenics, 15(4), 323–354.
Alias	IBD mapping, Autozygosity mapping, Homozygosity mapping	FST, Wright's F-statistics, Population differentiation index
Närliggande	4	4
Sammanfattning	Identity-by-descent (IBD) mapping is a genetic mapping technique that identifies disease loci in consanguineous families or isolated populations by detecting homozygous chromosomal segments shared among affected individuals. Developed by Lander and Botstein in 1987, this method exploits the fact that rare disease alleles in related individuals must lie within shared ancestral DNA blocks. By mapping regions where affected individuals are homozygous at multiple markers, researchers can localize disease genes to narrowly defined genomic intervals without prior knowledge of the disease mechanism.	F-statistics are a family of measures developed by Sewall Wright to quantify population genetic structure and the degree of genetic differentiation between populations. FST, the most widely used F-statistic, measures the proportion of total genetic variation attributable to differences between populations versus within populations. FST ranges from zero (no differentiation) to one (complete differentiation). These statistics have become fundamental tools for understanding population structure, detecting population admixture, and analyzing the evolutionary forces shaping genetic variation.