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ASReml

ASReml 2 add-on module for S-Plus and R users

ASReml 2 is currently available as a stand-alone platform with a Windows interface, or as an add-on module to S-plus or R. To find out what versions of ASReml are available on the different operating systems see the list of supported platforms.

In addition, we have simplified the licence process; you only need one licence to run ASReml-W, ASReml-S or ASReml-R.

So whatever your preferred working environment, you can access the power and efficiency of ASReml 2 in a manner that suits you.

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ASReml is a statistical package that fits linear mixed effects models using Residual Maximum Likelihood (REML) to provide a rich and flexible tool for the analysis of many data sets commonly arising in the agricultural, biological, medical and environmental sciences.

ASReml is a joint project of NSW Department of Primary Industries and Rothamsted Research. Its stable platform delivers well established procedures together with current research in the application of linear mixed models. The strength of ASReml is the use of the Average Information (AI) algorithm and sparse matrix methods for fitting the linear mixed model. As a result ASReml analyses large and complex data sets more efficiently than other packages.

ASReml Features

Uniquely efficient and fast algorithms for mixed model analysis, saving you considerable time and effort.
Handles large data sets (of 100,000 or more observations/effects).
Allows for direct fitting of cubic smoothing splines (Verbyla et al, 1999), with user-specified knot points.
Facilitates multi-environment trials for the analysis of plant or crop improvement data
Analyses univariate and multivariate breeding and genetics data
Supports a wide range of variance models for spatial analysis
Encourages innovative modelling of longitudinal data
ASReml has already been successfully applied to:
Animal and plant breeding and agricultural experimentation
Environmental sciences
Medical research

See the new features section for a full list.

Documentation and user contributions

Documentation can be found within the resources section of our site or through the help menu in the software.

There are various very useful user generated tutorials and manuals to be found in the user area. We would like to thank all those who have contributed and welcome any further contributions you may have to help your fellow ASReml users.