Including endophenotypes as covariates in variance component heritability and linkage analysis
نویسندگان
چکیده
منابع مشابه
Nonparametric linkage analysis using person-specific covariates.
Linkage analysis provides an important tool for mapping genes for complex disease. However its usefulness has been limited by inadequate marker density, inadequate sample sizes and the possibility that different genes account for different subtypes of the disease (phenotypic heterogeneity). The first two limitations can be addressed by high-density single nucleotide polymorphism (SNP) genotypin...
متن کاملA note on including phenotypic information from monozygotic twins in variance components QTL linkage analysis.
Williams & Blangero (1999) derived closed form expressions for the power of a univariate variance components test of linkage for a variety of pedigree structures. We have extended their results by investigating the effect of including monozygotic twins in the design on the power to detect linkage. Specifically, we determined the power associated with a pedigree of size three, where individuals ...
متن کاملEstimating the power of variance component linkage analysis in large pedigrees.
Variance component linkage analysis is commonly used to map quantitative trait loci (QTLs) in general pedigrees. Large pedigrees are especially attractive for these studies because they provide greater power per genotyped individual than small pedigrees. We propose accurate and computationally efficient methods to calculate the analytical power of variance component linkage analysis that can ac...
متن کاملVariance components linkage analysis with repeated measurements.
BACKGROUND When subjects are measured multiple times, linkage analysis needs to appropriately model these repeated measures. A number of methods have been proposed to model repeated measures in linkage analysis. Here, we focus on assessing the impact of repeated measures on the power and cost of a linkage study. METHODS We describe three alternative extensions of the variance components appro...
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Little is known about the genetic determinants explaining variation in sensitivity to chemotherapeutic cytotoxicity. We characterized the degree of cisplatin sensitivity, using lymphoblastoid cell lines derived from 10 Centre d'Etude du Polymorphisme Humain pedigrees. We estimated the heritability for susceptibility to cisplatin-induced cytotoxicity to be approximately 0.47; therefore, sensitiv...
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ژورنال
عنوان ژورنال: BMC Genetics
سال: 2005
ISSN: 1471-2156
DOI: 10.1186/1471-2156-6-s1-s49