Evidence map›Paper›PMID 23249312›Full record

ArticleHuman biology2012

PCAdmix: principal components-based assignment of ancestry along each chromosome in individuals with admixed ancestry from two or more populations.

Abra Brisbin, Katarzyna Bryc, Jake Byrnes, Fouad Zakharia, Larsson Omberg, Jeremiah Degenhardt, Andrew Reynolds, Harry Ostrer, Jason G Mezey, Carlos D Bustamante

Abstract readComparative StudyEvaluation Study
In one paragraph

Article in Human biology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 115 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
115citing papers in PubMed, 3 pooled it
5.8field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

115 citing papers in PubMed, 3 syntheses or guidelines pooled it, 175 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Ancestry estimation: Methodological evolution and forensic implications.Forensic science, medicine, and pathology · 2026
    Review
  5. Article
  6. Admixture Mapping of Lipid Traits in Hispanic Americans.Journal of the American Heart Association · 2025
    Article
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  19. The genomics of linkage drag in inbred lines of sunflower.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  20. Article

55 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 1 institution in 1 country.

Abra BrisbinDepartment of Biostatistics and Computational Biology, Cornell University, Ithaca, NY, USA. abrisbin@gmail.com
Katarzyna Bryc
Jake Byrnes
Fouad Zakharia
Larsson Omberg
Jeremiah Degenhardt
Andrew Reynolds
Harry Ostrer
Jason G Mezey
Carlos D Bustamante
Cornell University · US

Funding

Genomic Origins and Admixture in Latinos (GOAL)R01GM090087 · NIGMS · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI BUSTAMANTE, CARLOS DANIEL, MARTIN, EDEN R. · 2011 to 2014
$1.6M
Association Mapping in Structured PopulationsR01GM083606 · NIGMS · STANFORD UNIVERSITY · PI BUSTAMANTE, CARLOS DANIEL · 2007 to 2010
$1.3M
NIGMS NIH HHS R01 GM083606NIGMS NIH HHS R01 GM090087
6 · The paper itself

Abstract

Identifying ancestry along each chromosome in admixed individuals provides a wealth of information for understanding the population genetic history of admixture events and is valuable for admixture mapping and identifying recent targets of selection. We present PCAdmix (available at https://sites.google.com/site/pcadmix/home ), a Principal Components-based algorithm for determining ancestry along each chromosome from a high-density, genome-wide set of phased single-nucleotide polymorphism (SNP) genotypes of admixed individuals. We compare our method to HAPMIX on simulated data from two ancestral populations, and we find high concordance between the methods. Our method also has better accuracy than LAMP when applied to three-population admixture, a situation as yet unaddressed by HAPMIX. Finally, we apply our method to a data set of four Latino populations with European, African, and Native American ancestry. We find evidence of assortative mating in each of the four populations, and we identify regions of shared ancestry that may be recent targets of selection and could serve as candidate regions for admixture-based association mapping.

Indexed as

Chromosomes, HumanGenotypeModels, GeneticPolymorphism, Single NucleotidePopulation DynamicsAlgorithmsComputer SimulationGenomicsHumansPhylogeographyPrincipal Component AnalysisRacial GroupsUnited States

Identifiers

PMID23249312
PMCPMC3740525
OpenAlexW2112388098

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.