Affected-sib-pair interval mapping and exclusion for complex genetic traits: Sampling considerations

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Affected-sib-pair interval mapping and exclusion for complex genetic traits: sampling considerations.

We describe an extension of Risch's [(1990a,b) Am J Hum Genet 46:222-228, 229-241] method of linkage detection and exclusion for complex genetic traits. The method uses interval mapping to infer disease locus identity-by-descent (IBD) sharing for affected sib pairs (ASPs) based on marker information for the ASP and other genotyped family members. The method is likelihood based, and makes use of...

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An extension to current maximum-likelihood variance-components procedures for mapping quantitative-trait loci in sib pairs that allows a simultaneous test of allelic association is proposed. The method involves modeling of the allelic means for a test of association, with simultaneous modeling of the sib-pair covariance structure for a test of linkage. By partitioning of the mean effect of a lo...

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A new transmission test for affected sib-pair families

Family-based association approaches such as the transmission-disequilibrium test (TDT) are used extensively in the study of genetic traits because they are generally robust to the presence of population structure. However, these approaches necessarily involve recruitment of families, which is more costly and time-consuming than sampling unrelated individuals in the population-based approaches. ...

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Comparison of Affected-Sib-Pair Statistics for Multi-Locus Genetic Disease Models in Multi-Marker Analysis

Now, many human genetist are trying to detect agent loci of common diseases, such as hypertension, diabetes, heart disease, multiple sclerosis, arthritis, obesity, and so on. These diseases are caused by multiple genes interacting with each other and with environmental factors to create a gradient of genetic susceptibility to disease. Even when a trait is governed by multiple disease genes, for...

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ژورنال

عنوان ژورنال: Genetic Epidemiology

سال: 1996

ISSN: 0741-0395,1098-2272

DOI: 10.1002/(sici)1098-2272(1996)13:2<117::aid-gepi1>3.0.co;2-5