title: Fine-scale genetic mapping using independent component analysis.
abstract: The aim of genetic mapping is to locate the loci responsible for specific traits such as complex diseases. These traits are normally caused by mutations at multiple loci of unknown locations and interactions. In this work, we model the biological system that relates DNA polymorphisms with complex traits as a linear mixing process. Given this model, we propose a new fine-scale genetic mapping method based on independent component analysis. The proposed method outputs both independent associated groups of SNPs in addition to specific associated SNPs with the phenotype. It is applied to a clinical data set for the Schizophrenia disease with 368 individuals and 42 SNPs. It is also applied to a simulation study to investigate in more depth its performance. The obtained results demonstrate the novel characteristics of the proposed method compared to other genetic mapping methods. Finally, we study the robustness of the proposed method with missing genotype values and limited sample sizes.
authors.affiliation: Department of Electrical and Computer Engineering, American University of Beirut, Riad El Solh 11-0236, Beirut 1107 2020, Lebanon. zaher.dawy@aub.edu.lb
authors.forename: Zaher
authors.initials: Z
authors.lastname: Dawy
authors.forename: Michel
authors.initials: M
authors.lastname: Sarkis
authors.forename: Joachim
authors.initials: J
authors.lastname: Hagenauer
authors.forename: Jakob C
authors.initials: JC
authors.lastname: Mueller
mesh_terms: D000465:Algorithms; D002874:Chromosome Mapping / Q000379:methods*; D003627:Data Interpretation, Statistical; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006801:Humans; D015810:Linkage Disequilibrium / Q000235:genetics*; D008957:Models, Genetic; D015233:Models, Statistical; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D025341:Principal Component Analysis; D012559:Schizophrenia / Q000235:genetics*; D012680:Sensitivity and Specificity; D017422:Sequence Analysis, DNA / Q000379:methods*