WOMBAT—A tool for mixed model analyses in quantitative genetics by restricted maximum likelihood (REML) WOMBAT is a software package for quantitative genetic analyses of continuous traits, fitting a linear, mixed model; estimates of covariance components and the resulting genetic parameters are obtained by restricted maximum likelihood. A wide range of models, comprising numerous traits, multiple fixed and random effects, selected genetic covariance structures, random regression models and reduced rank estimation are accommodated. WOMBAT employs up-to-date numerical and computational methods. Together with the use of efficient compilers, this generates fast executable programs, suitable for large scale analyses. Use of WOMBAT is illustrated for a bivariate analysis. The package consists of the executable program, available for LINUX and WINDOWS environments, manual and a set of worked example, and can be downloaded free of charge from http://agbu.une.edu.au/ kmeyer/wombat.html. Try: https://sites.google.com/site/remlwombat/
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- Heckman, Nancy; Lockhart, Richard; Nielsen, Jason D.: Penalized regression, mixed effects models and appropriate modelling (2013)