A chromosome-based method to infer IBD scores for missing and ambiguous markers.
We propose a probability model to impute missing identical-by-descent (IBD) vectors for linkage analysis, when adjacent marker loci are typed and interference is estimable. A chromosome-based IBD distribution, conditioned on available marker data, is computed using a fast algorithm to estimate the joint probability of genes IBD at several equally spaced linked loci. Weighted IBD vectors are then used in various test statistics for linkage analysis. As an example, we analyzed the 18 affected sib pairs in the GAW9 Problem 1 data set using Risch's lod-score test.
Gu
C
C
Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
Suarez
B K
BK
Reich
T
T
Todorov
A A
AA
D000465:Algorithms; D002874:Chromosome Mapping; D008040:Genetic Linkage; D005819:Genetic Markers; D005822:Genetic Vectors; D006801:Humans; D008126:Lod Score; D009679:Nuclear Family; D011336:Probability
D005819:Genetic Markers