Amos C I, Dawson D V, Elston R C
Family Studies Section, National Cancer Institute, Bethesda, MD 20892.
Am J Hum Genet. 1990 Nov;47(5):842-53.
Methods for detecting genetic linkage are more powerful when they fully use all of the data collected from pedigrees. We first discuss a method for obtaining the probability that a pedigree member has a given genotype, conditional on the phenotypes of his relatives. We then develop a rapid method to obtain the conditional probabilities of identity-by-descent sharing of marker alleles for all related pairs of individuals from extended pedigrees. The method assumes that the individuals are noninbred and that the relationship between genotype and phenotype is known for the marker locus studied. The probabilities of identity-by-descent sharing among relative pairs, conditional on marker phenotype information, can then be used in any of the model free tests for linkage between a trait locus and a marker locus.
当能充分利用从家系收集的所有数据时,检测基因连锁的方法会更有效。我们首先讨论一种方法,该方法用于获得家系成员具有特定基因型的概率,此概率以其亲属的表型为条件。然后,我们开发了一种快速方法,用于从扩展家系中所有相关个体对获得标记等位基因通过血缘共享的条件概率。该方法假设个体是非近亲繁殖的,并且对于所研究的标记位点,基因型与表型之间的关系是已知的。然后,基于标记表型信息的相对个体对之间通过血缘共享的概率,可用于性状位点与标记位点之间连锁的任何无模型检验。