title: Comparison of parametric and nonparametric methods to map oligogenes by linkage.
abstract: A sample of 95 sib pairs affected with insulin-dependent diabetes and typed with their normal parents for 28 markers on chromosome 6 has been analyzed by several methods. When appropriate parameters are efficiently estimated, a parametric model is equivalent to the beta model, which is superior to nonparametric alternatives both in single point tests (as found previously) and in multipoint tests. Theory is given for meta-analysis combined with allelic association, and problems that may be associated with errors of map location and/or marker typing are identified. Reducing by multipoint analysis the number of association tests in a dense map can give a 3-fold reduction in the critical lod, and therefore in the cost of positional cloning.
authors.affiliation: Human Genetics, University of Southampton, Princess Anne Hospital, Level G, Coxford Road, Southampton, United Kingdom.
authors.forename: P
authors.initials: P
authors.lastname: Liò
authors.forename: N E
authors.initials: NE
authors.lastname: Morton
mesh_terms: D000328:Adult; D002648:Child; D002874:Chromosome Mapping / Q000379:methods*; D002896:Chromosomes, Human, Pair 6; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics*; D008040:Genetic Linkage; D006680:HLA Antigens / Q000235:genetics; D006801:Humans; D008126:Lod Score; D015233:Models, Statistical; D009679:Nuclear Family; D011336:Probability; D012984:Software; D018709:Statistics, Nonparametric
chemical_list: D006680:HLA Antigens