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Comput Biol Chem. 2010 Aug;34(4):242-3. doi: 10.1016/j.compbiolchem.2010.08.004. Epub 2010 Sep 9.

Ped_Outlier software for automatic identification of within-family outliers.

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  • 1Institute of Cytology & Genetics, Siberian Division, Russian Academy of Sciences, Lavrentiev Av., 10, Novosibirsk 630090, Russia.


A high-throughput resequencing technology has brought family based studies back into genetic research focus. Within-family outliers (the individuals whose phenotype is very much unlike the phenotype of relatives) may carry rare variants of large effects and thus resequencing of these provides a highly powered strategy for rare variants detection. On the other hand, such outliers may complicate search for common variants of smaller effects, because they may obscure a real linkage signal. We have developed a program Ped_Outlier allowing automatic detection of within-family outliers in a sample of pedigrees of arbitrary structure and size. We tested our program by identification of within-family outliers for adult height and intracranial volume in large pedigree. Results of linkage analysis of these traits demonstrated that identification of within-family outliers is one of the important steps of pedigree analysis. The program Ped_outlier is freely available at

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