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	Admixturanalys	Ancestral State Reconstruction
Ämnesområde	Genetik	Genetik
Familj	Process / pipeline	Process / pipeline
Ursprungsår	2009	1991
Upphovsperson	David Alexander & Jonathan Novembre	Wayne Maddison
Typ	Clustering and inference method	Inference method
Ursprungskälla	Alexander, D. H., Novembre, J., & Lange, K. (2009). Fast model-based estimation of ancestry in unrelated individuals. Genome Research, 19(9), 1655–1664.	Maddison, W. P. (1991). Squared-change parsimony reconstructions of ancestral states for continuous-valued characters on a phylogenetic tree. Systematic Zoology, 40(3), 308–314.
Alias	Population structure inference, Ancestry analysis, ADMIXTURE	ASR, Ancestral character reconstruction, Trait reconstruction
Närliggande	4	3
Sammanfattning	Admixture analysis is a population genetics method that infers population structure and individual ancestry from multilocus genotype data. Originally developed by Pritchard, Stephens, and Donnelly (2000) and refined by Alexander, Novembre, and Lange (2009), admixture analysis reveals how genetic variation is distributed among populations and estimates the ancestry fractions of admixed individuals. This technique is essential for understanding human evolutionary history, detecting population stratification in genetic studies, and inferring individual ancestry.	Ancestral state reconstruction (ASR) is a phylogenetic method that infers the character states (trait values or evolutionary features) of extinct ancestors by analyzing patterns of variation in extant (living) species. Developed by Wayne Maddison and colleagues in the 1990s, ASR uses the phylogenetic tree and observed trait variation in living species to estimate what ancestors possessed, enabling researchers to trace the evolutionary history of morphological, behavioral, ecological, and genomic traits.