A novel method for detecting uniparental disomy from trio genotypes identifies a significant excess in children with developmental disorders

Genome Research
Daniel A KingDDD Study

Abstract

Exome sequencing of parent-offspring trios is a popular strategy for identifying causative genetic variants in children with rare diseases. This method owes its strength to the leveraging of inheritance information, which facilitates de novo variant calling, inference of compound heterozygosity, and the identification of inheritance anomalies. Uniparental disomy describes the inheritance of a homologous chromosome pair from only one parent. This aberration is important to detect in genetic disease studies because it can result in imprinting disorders and recessive diseases. We have developed a software tool to detect uniparental disomy from child-mother-father genotype data that uses a binomial test to identify chromosomes with a significant burden of uniparentally inherited genotypes. This tool is the first to read VCF-formatted genotypes, to perform integrated copy number filtering, and to use a statistical test inherently robust for use in platforms of varying genotyping density and noise characteristics. Simulations demonstrated superior accuracy compared with previously developed approaches. We implemented the method on 1057 trios from the Deciphering Developmental Disorders project, a trio-based rare disease study, and de...Continue Reading

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Citations

Jan 31, 2015·Human Molecular Genetics·Daniel A KingUNKNOWN Deciphering Developmental Disorders Study
Dec 24, 2014·Nature·UNKNOWN Deciphering Developmental Disorders Study
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