Inferring haplotypes of copy number variations from high-throughput data with uncertainty.
Inferring haplotypes of copy number variations from high-throughput data with uncertainty.
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DOI:
10.1534/g3.111.000174
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发表时间:
2011-06
期刊:
影响因子:
--
通讯作者:
Zhang MQ
中科院分区:
文献类型:
--
作者:
Kato M;Yoon S;Hosono N;Leotta A;Sebat J;Tsunoda T;Zhang MQ
Accurate information on haplotypes and diplotypes (haplotype pairs) is required for population-genetic analyses; however, microarrays do not provide data on a haplotype or diplotype at a copy number variation (CNV) locus; they only provide data on the total number of copies over a diplotype or an unphased sequence genotype (e.g., AAB, unlike AB of single nucleotide polymorphism). Moreover, such copy numbers or genotypes are often incorrectly determined when microarray signal intensities derived from different copy numbers or genotypes are not clearly separated due to noise. Here we report an algorithm to infer CNV haplotypes and individuals’ diplotypes at multiple loci from noisy microarray data, utilizing the probability that a signal intensity may be derived from different underlying copy numbers or genotypes. Performing simulation studies based on known diplotypes and an error model obtained from real microarray data, we demonstrate that this probabilistic approach succeeds in accurate inference (error rate: 1–2%) from noisy data, whereas previous deterministic approaches failed (error rate: 12–18%). Applying this algorithm to real microarray data, we estimated haplotype frequencies and diplotypes in 1486 CNV regions for 100 individuals. Our algorithm will facilitate accurate population-genetic analyses and powerful disease association studies of CNVs.
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通讯作者:
Kersten, Birgit
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Eichler, Evan E.
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通讯作者:
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