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Japonica array: improved genotype imputation by designing a population-specific SNP array with 1070 Japanese individuals

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Kawai, Yosuke, Mimori, Takahiro, Kojima, Kaname, Nariai, Naoki, Danjoh, Inaho, Saito, Rumiko, Yasuda, Jun, Yamamoto, Masayuki, Nagasaki, Masao·2015·Journal of Human Genetics

Abstract

The Tohoku Medical Megabank Organization constructed the reference panel (referred to as the 1KJPN panel), which contains >20 million single nucleotide polymorphisms (SNPs), from whole-genome sequence data from 1070 Japanese individuals. The 1KJPN panel contains the largest number of haplotypes of Japanese ancestry to date. Here, from the 1KJPN panel, we designed a novel custom-made SNP array, named the Japonica array, which is suitable for whole-genome imputation of Japanese individuals. The array contains 659,253 SNPs, including tag SNPs for imputation, SNPs of Y chromosome and mitochondria, and SNPs related to previously reported genome-wide association studies and pharmacogenomics. The Japonica array provides better imputation performance for Japanese individuals than the existing commercially available SNP arrays with both the 1KJPN panel and the International 1000 genomes project panel. For common SNPs (minor allele frequency (MAF)>5%), the genomic coverage of the Japonica array (r(2)>0.8) was 96.9%, that is, almost all common SNPs were covered by this array. Nonetheless, the coverage of low-frequency SNPs (0.5%

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Metadata

Authors
Kawai, Y., Mimori, T., Kojima, K., Nariai, N., Danjoh, I., Saito, R., Yasuda, J., Yamamoto, M., & Nagasaki, M.
Venue
Journal of Human Genetics
Published
2015-06-25
Volume
60
Issue
10
Pages
581-587
ISSN
  • 1434-5161 (ISSN-L)
  • 1435-232X
OpenAlex
W1487785114
Cited by
163
References
5
FWCI
5.14
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Japonica array: improved genotype imputation by designing a population-specific SNP array with 1070 Japanese individuals. https://app.cochat.ai/papers/10.1038/jhg.2015.68
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Kawai, Y., Mimori, T., Kojima, K., Nariai, N., Danjoh, I., Saito, R., Yasuda, J., Yamamoto, M., & Nagasaki, M. (2015). Japonica array: improved genotype imputation by designing a population-specific SNP array with 1070 Japanese individuals. Journal of Human Genetics. https://doi.org/10.1038/jhg.2015.68

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