Journal
NATURE GENETICS
Volume 41, Issue 4, Pages 430-437Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ng.350
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Funding
- US National Institutes of Health/National Cancer Institute [CA101937]
- National Human Genome Research Institute [T32 HG000045]
- Kauffman Fellowship
- NCI Cancer Center [P30 CA91842]
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The extent to which differences in germline DNA copy number contribute to natural phenotypic variation is unknown. We analyzed the copy number content of the mouse genome to sub-10-kb resolution. We identified over 1,300 copy number variant regions (CNVRs), most of which are <10 kb in length, are found in more than one strain, and, in total, span 3.2% (85 Mb) of the genome. To assess the potential functional impact of copy number variation, we mapped expression profiles of purified hematopoietic stem and progenitor cells, adipose tissue and hypothalamus to CNVRs in cis. Of the more than 600 significant associations between CNVRs and expression profiles, most map to CNVRs outside of the transcribed regions of genes. In hematopoietic stem and progenitor cells, up to 28% of strain-dependent expression variation is associated with copy number variation, supporting the role of germline CNVs as key contributors to natural phenotypic variation in the laboratory mouse.
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