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An estimating function approach to linkage heterogeneity

机译:链接异质性的估计函数方法

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摘要

Testing linkage heterogeneity between two loci is an important issue in genetics. Currently, there are four methods (K-test, A-test, B-test and D-test) for testing linkage heterogeneity in linkage analysis, which are based on the likelihood-ratio test. Among them, the commonly used methods are the K-test and A-test. In this paper, we present a novel test method which is different from the above four tests, called G-test. The new test statistic is based on estimating function, possessing a theoretic asymptotic distribution, and therefore demonstrates its own advantages. The proposed test is applied to analyse a real pedigree dataset. Our simulation results also indicate that the G-test performs well in terms of power of testing linkage heterogeneity and outperforms the current methods to some degree.
机译:测试两个基因座之间的连锁异质性是遗传学中的重要问题。目前,在连锁分析中有四种测试连锁异质性的方法(K检验,A检验,B检验和D检验),基于似然比检验。其中,常用的方法是K检验和A检验。在本文中,我们提出了一种不同于上述四种测试的新颖测试方法,称为G检验。新的检验统计量基于估计函数,具有理论上的渐近分布,因此证明了自己的优势。拟议的测试用于分析真实的血统书数据集。我们的仿真结果还表明,G检验在测试链接异质性的能力方面表现良好,并且在某种程度上优于当前方法。

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