Bayesian methods for estimating GEBVs of threshold traits
文献类型: 外文期刊
第一作者: Wang, C-L
作者: Wang, C-L;Ding, X-D;Wang, J-Y;Liu, J-F;Fu, W-X;Zhang, Z.;Yin, Z-J;Zhang, Q.;Wang, C-L
作者机构:
关键词: Bayesian methods;genomic selection;MCMC;threshold traits
期刊名称:HEREDITY ( 影响因子:3.821; 五年影响因子:4.553 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Estimation of genomic breeding values is the key step in genomic selection (GS). Many methods have been proposed for continuous traits, but methods for threshold traits are still scarce. Here we introduced threshold model to the framework of GS, and specifically, we extended the three Bayesian methods BayesA, BayesB and BayesC pi on the basis of threshold model for estimating genomic breeding values of threshold traits, and the extended methods are correspondingly termed BayesTA, BayesTB and BayesTC pi. Computing procedures of the three BayesT methods using Markov Chain Monte Carlo algorithm were derived. A simulation study was performed to investigate the benefit of the presented methods in accuracy with the genomic estimated breeding values (GEBVs) for threshold traits. Factors affecting the performance of the three BayesT methods were addressed. As expected, the three BayesT methods generally performed better than the corresponding normal Bayesian methods, in particular when the number of phenotypic categories was small. In the standard scenario (number of categories = 2, incidence = 30%, number of quantitative trait loci = 50, h(2) = 0.3), the accuracies were improved by 30.4%, 2.4%, and 5.7% points, respectively. In most scenarios, BayesTB and BayesTC pi generated similar accuracies and both performed better than BayesTA. In conclusion, our work proved that threshold model fits well for predicting GEBVs of threshold traits, and BayesTC pi is supposed to be the method of choice for GS of threshold traits. Heredity (2013) 110, 213-219; doi:10.1038/hdy.2012.65; published online 14 November 2012
分类号: Q3
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