数字农科院2.0

Multiple-trait genome-wide association study based on principal component analysis for residual covariance matrix

文献类型： 外文期刊

作者： Gao, H.;Wu, Y.;Li, J.;Zhang, T.;Wu, Y.;Jiang, L.;Zhan, J.;Yang, R.

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关键词： Cystic echinococcosis;Echinococcus granulosus sensu lato;Hydatid cyst;Hydatidosis;Systematic review

期刊名称： HEREDITY

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收录情况： SCI

摘要： Given the drawbacks of implementing multivariate analysis for mapping multiple traits in genome-wide association study (GWAS), principal component analysis (PCA) has been widely used to generate independent 'super traits' from the original multivariate phenotypic traits for the univariate analysis. However, parameter estimates in this framework may not be the same as those from the joint analysis of all traits, leading to spurious linkage results. In this paper, we propose to perform the PCA for residual covariance matrix instead of the phenotypical covariance matrix, based on which multiple traits are transformed to a group of pseudo principal components. The PCA for residual covariance matrix allows analyzing each pseudo principal component separately. In addition, all parameter estimates are equivalent to those obtained from the joint multivariate analysis under a linear transformation. However, a fast least absolute shrinkage and selection operator (LASSO) for estimating the sparse oversaturated genetic model greatly reduces the computational costs of this procedure. Extensive simulations show statistical and computational efficiencies of the proposed method. We illustrate this method in a GWAS for 20 slaughtering traits and meat quality traits in beef cattle.

分类号： Q3

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