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9.1 Introduction to PolyEM programs

PolyEM is a set of programs to evaluate the likelihood and compute MLEs for polygenic models of quantitative traits by EM algorithms. There are four main programs whose features are summarized below:

All programs can work with looped pedigrees. The exception is that looped pedigrees cannot be used for the polygenic peeling algorithm in univar. The other programs do not use polygenic peeling to evaluate the likelihood.

Only examples and statement references for multivar are given since it has the most complete features. The statements for other programs are similar with obvious exceptions (e.g., any statements with covariances do not apply to univar or unibig).



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