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- W4320167425 abstract "Inference of population structure from genetic data plays an important role in population and medical genetics studies. With the advancement and decreasing cost of sequencing technology, the increasingly available whole genome sequencing data provide much richer information about the underlying population structure. The traditional method (Patterson, Price, and Reich, 2006) originally developed for array-based genotype data for computing and selecting top principal components that capture population structure may not perform well on sequencing data for two reasons. First, the number of genetic variants p is much larger than the sample size n in sequencing data such that the sample-to-marker ratio n/p is nearly zero, violating the assumption of the Tracy-Widom test used in their method. Second, their method might not be able to handle the linkage disequilibrium well in sequencing data. To resolve those two practical issues, we propose a new method called ERStruct to determine the number of top informative principal components based on sequencing data. More specifically, we propose to use the ratio of consecutive eigenvalues as a more robust test statistic, and then we approximate its null distribution using modern random matrix theory. Both simulation studies and applications to two public data sets from the HapMap 3 and the 1000 Genomes Projects demonstrate the empirical performance of our ERStruct method." @default.
- W4320167425 created "2023-02-13" @default.
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- W4320167425 date "2021-04-05" @default.
- W4320167425 modified "2023-10-18" @default.
- W4320167425 title "An Eigenvalue Ratio Approach to Inferring Population Structure from Whole Genome Sequencing Data" @default.
- W4320167425 doi "https://doi.org/10.48550/arxiv.2104.01944" @default.
- W4320167425 hasPublicationYear "2021" @default.
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