WOMBAT is a program to facilitate analyses fitting a linear, mixed model via restricted
maximum likelihood (REML).
  • It is assumed that traits analysed are continuous and have a multivariate normal distribution. 
  • WOMBAT is set up with quantitative genetic analyses in mind, but is readily applicable in other areas. Its main purpose is the estimation of (co)variance components and the resulting genetic parameters. It is particularly suited to analyses of moderately large to large data sets from livestock improvement programmes, fitting relatively simple models.


  • WOMBAT replaces DFREML which has been withdrawn from distribution at the end of 2005.
  • Linux: Highly optimised  executables, capable of analysing relatively large models and data sets, are available for 32-bit and 64-bit PCs.
  • Windows: 32-bit versions are available, but are slower and restricted to smaller analyses than the Linux executables.
  • Installation instructions are contained in the user manual (chapter 3).
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Windows Cygwin version (g95 complier)   1420k v. 2 6 Oct 2011, 19:41 karin meyer
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Linux 32-bit version (Lahey compiler) with all checks switched on; use for bug reports   2948k v. 3 6 Oct 2011, 19:43 karin meyer
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Linux 32-bit version (Lahey compiler)   1173k v. 3 6 Oct 2011, 19:43 karin meyer
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WOMBAT User Notes; pdf file   2144k v. 3 6 Oct 2011, 19:37 karin meyer
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Windows version (MinGW; g95 compiler)   1420k v. 2 6 Oct 2011, 19:43 karin meyer
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Linux 32-bit version (Pathscale compiler)   3246k v. 3 6 Oct 2011, 19:44 karin meyer
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Linux 64-bit version (Pathscale compiler)   3154k v. 3 6 Oct 2011, 19:44 karin meyer