Re: Singularity In Average Information Matrix Using Ainverse

Dear Michelle,

It is quite straight forward.

1) You need Sire coded in the data file

Then to start with, just fit Sire as a factor.

Similarly, if you have Maternal Grand sire as a column in the data file,

Add that to the model as a simple factor.

That should give the main information you need to see where the variation lies.

2) If there is depth of pedigree (so you know parents of Sires and parents
of Maternal Grand sires, you can create a single pedigree file
giving pedigree for Sires and Maternal Grand sires.

Then fit Sire and Dam using the pedigree relationship matrix.

2) You create a pedigree file for

------------------------
Arthur Gilmour

Retired Principal Research Scientist (Biometrics)

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Received on Fri Sep 24 2009 - 11:53:13 EST