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This page was updated on 2012-12-16 (NZST) and is tagged asreml, statistics, software.

Since I run all my non-genetic statistical analyses in R and created the ASReml cookbook in 2001, I thought it would be useful to 'translate' the cookbook to ASReml-R, the R package version of ASReml.

I see this document as providing an entry point to R for traditional ASReml users and to ASReml for traditional R users (used to nlme or lme4).

The translation effort is relatively recent, so these pages are in a state of disarray. Another difference is that I discovered that there were several users outside tree breeding—mostly animal and crop breeders—that were using the cookbook as a 'quick start', so I will try to cover a few things outside tree breeding. In addition, we have the crowd applying quantitative genetics to study natural populations and evolution; incidentally, we used ASReml to study the genetics of personality of squid around 2005-2006 (see my publication [27]).

If you see this document (both structure and content) changing often take it as good news; that would mean that I am busy typing stuff. The notation of ASReml-R is relatively new to me, so I need to rediscover how to do things in this new beast.

- Posts in my blog, this is where I update most frequently. It covers more advanced uses and comparisons with other software.
- Very basic usage.
- Specifying model equations.
- Univariate analysis, including basic equivalent models, diallels, clonal trials and multiple-site as single trait.
- Extracting results like variance components, fixed and random effects, etc, from the fitted model.
- Covariance structures.
- Multiple environments.

If you are stuck preparing your analysis, please ask the question(s) in the
ASReml forum. I barely
have time to run my own analyses; **I cannot provide direct help on ASReml**.

- The official ASReml-R reference manual (PDF file) at VSN international.
- The mixed-models-on-TAP website. This site, by the ASReml crowd, aims to introduce people to the analysis of mixed models. Most content is still under construction.
- Updates and beta (some times more like alpha) versions of ASReml-r are posted in mixed-models-on-tap and in austatgen (now deprecated although keeps on getting updated).
- The R wiki contains a brief and clear tutorial written by Kevin on fitting a linear model with ASReml-R.
- The Wild Animal Modeling Wiki (WAMWiki, Isn't that a cool name?) contains tutorials for several programs, including ASReml-R. Those tutorials support a good review paper (available in the site) on applications of animal model BLUP in ecology.
- A 2007 presentation (PDF 1.9 MB) by David Butler on 'Asreml-R: an R package for mixed models using residual maximum likelihood'. It provides a broad overview of ASReml-R syntax and capabilities.