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[Algorithms of likelihood ratio for discriminating full sibling from half sibling].
Zhao, Shu-Min; Zhang, Lin-Na; Zhang, Su-Hua; Zhang, Na; Zhao, Zhen-Min; Li, Cheng-Tao.
Afiliação
  • Zhao SM; Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, P R China, Shanghai 200063, China. zhaoshuminxl@hotmail.com
Fa Yi Xue Za Zhi ; 28(2): 104-8, 2012 Apr.
Article em Zh | MEDLINE | ID: mdl-22619804
OBJECTIVE: To derive the formulae for likelihood ratio calculation in discriminating full sibling from half sibling with single-parent participation or without parent participation. METHODS: Null hypothesis and alternative hypothesis were established for discriminating full sibling from half sibling in two circumstances: two children with single-parent and without parent participation. Conditional probabilities of the genetic evidentiary under null and alternative hypotheses were calculated according to the Bayesian theory. The likelihood ratios were established with the conditional probability under alternative hypothesis division that under null hypothesis, followed with simplification. All the formulae were validated in a real case. RESULTS: While mother or fathers' genetic information available in differentiating full sibling from half sibling, 14 different genotype combinations could be shared by the two detected children at a given locus and the likelihood ratio could be calculated with 5 different formulae respectively. While both parents' genetic information unavailable, 11 different genotype combinations could be shared and the likelihood ratio could be calculated with 7 different formulae respectively. It was validated in a real case that the power of the likelihood ratio method developed for discriminating full sibling from half sibling with single-parent participation was higher than that of the ratio of full sibling index over half sibling index. CONCLUSION: The formulae of likelihood ratio developed are useful for discriminating full sibling from half sibling with single-parent participation or without parent participation.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Algoritmos / Funções Verossimilhança / Sequências de Repetição em Tandem / Cromossomos Humanos X / Irmãos Tipo de estudo: Prognostic_studies Limite: Child / Female / Humans Idioma: Zh Revista: Fa Yi Xue Za Zhi Assunto da revista: JURISPRUDENCIA Ano de publicação: 2012 Tipo de documento: Article País de afiliação: China
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Algoritmos / Funções Verossimilhança / Sequências de Repetição em Tandem / Cromossomos Humanos X / Irmãos Tipo de estudo: Prognostic_studies Limite: Child / Female / Humans Idioma: Zh Revista: Fa Yi Xue Za Zhi Assunto da revista: JURISPRUDENCIA Ano de publicação: 2012 Tipo de documento: Article País de afiliação: China