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Individual/Animal Model

Select menu: Stats | Genetic Models | Individual/Animal Model

Use this to fit single trait genetic models using pedigree information. Models available include those for individual/animals, maternal effects and common environmental effects.

  1. After you have imported your data, from the menu select 
    Stats | Genetic Models | Individual/Animal Model.
  2. Fill in the fields as required then click Run.

You can set additional Options then after running the analysis you can save the results by clicking Save.

Available data

This lists data structures appropriate to the current input field. Double-click a name to copy it to the current input field or type the name.

Genetic model

Selects the type of genetic model to be analysed.

Animal model Fits a single trait individual/animal model where a breeding value is fitted as a random effect. This obtains an estimate of the variance in breeding values which is defined as the additive genetic variance.
Maternal trait model Fits a single trait maternal effects model where a random term is included to model the effects on the offspring trait shared by offspring of the same mother (independent of the additive genetic effects.
Common environmental effects model Fits a single trait common environmental effects model where a random term is included to model environmental effects shared by groups of individuals/animals that are not due to genetic effects.


Specifies the response variate for analysis.


Specifies a pedigree for the parentage of the animals or individuals.

A matrix Specifies the relationship matrix for the pedigree. The values can be supplied within a symmetric matrix or in a pointer to a sparse inverse form. A sparse form of the inverse matrix can be generated by clicking on the Generate button. If the inverse relationship matrix is supplied then select the Use inverse A matrix option.
ID Individual/Animal A factor identifying the individuals/animals within the pedigree.


A factor identifying the individuals/animals within the pedigree for each value of the trait (y-variate).

Maternal factor

For a maternal trait model this specifies a factor for the mothers of the individuals/animals. The factor must be formed using the same ids as used within the pedigree.

Environment factor

For a common environmental effects model this specifies a factor identifying the different environments.

Fixed terms

The fixed model describes imposed treatment factors and covariates for which the effect of specified levels or values are of interest. The model is described using a formula, which can combine main effects and interactions of factors and also covariates.

Random terms

Allows additional terms to be included in the random model. The random model is generally used to describe those factors for which the values present in an experiment can be considered drawn from some large homogeneous population. The model is described using a formula, which can combine main effects and interactions of factors and also covariates.

Action buttons

Run Run the analysis.
Cancel Close the dialog without further changes.
Options Opens a dialog where additional options and settings can be specified for the analysis.
Defaults Reset options to the default settings. Clicking the right mouse on this button produces a shortcut menu where you can choose to set the options using the currently stored defaults or the Genstat default settings.
Save Opens a dialog where you can save results from the analysis.
Predict Allows you to form predictions based on the current model.
Further output Opens a dialog for specifying further output from the analysis and displaying residual and means plots.

Action Icons

Pin Controls whether to keep the dialog open when you click Run. When the pin is down  the dialog will remain open, otherwise when the pin is up  the dialog will close.
Restore Restore names into edit fields and default settings.
Clear Clear all fields and list boxes.
Help Open the Help topic for this dialog.

See also

Updated on April 18, 2019

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