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Genome Biol. 2005;6(3):R27. Epub 2005 Feb 28.

Weighting by heritability for detection of quantitative trait loci with microarray estimates of gene expression.

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  • 1Department of Pathology, University of Tennessee Health Science Center, 855 Monroe Avenue, Memphis, TN 38163, USA. kmanly@tennessee.edu


Heritable differences in transcribed RNA levels can be mapped as quantitative trait loci (QTLs). Transcribed RNA levels are often measured by hybridization to microarrays of oligonucleotide probes, in which each transcript is represented by multiple probes. The use of recombinant inbred lines allows an estimate of the heritability of expression measured by individual probes. This heritability varies greatly. We have tested heritability-weighted averages to define expression of a transcript and found that these allow detection of more QTLs than previously described methods.

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