pedigree and GxE analysis

From: Ky Mathews <kmathews_at_UQ.EDU.AU>
Date: Fri, 7 Jan 2005 18:36:52 +1000

Dear ASREML users,

I'm using pedigree information in the form of a generalised inverse
relationship matrix (coefficient of parentage matrix in crop terminology) in a
genotype by environment model.

The model I'm using with BLUEs and weights from single site analysis is:

yld !WT yldwt ~ mu site !r site.giv(gen),
!f mv
1 1 0
2922 0 IDEN !S2==0.3118207 #yld
predict site gen

This model works and the values seem sensible however I'm having trouble
finding examples of others doing this, although there is a example of how to
set up the code in the latest ASREML manual using site and variety factors...
Has anyone done something similar and investigated how the site.gen variance
component changes with the inclusion of the pedigree infromation? And/or
described the theory?

Many thanks

Dr Ky L Mathews
CSIRO Plant Industry
Queensland Bioscience Precinct
306 Carmody Road
St Lucia QLD 4067 Australia
Ph: +61 7 3214 2255
Fax: + 61 7 3214 2950

"Its a poor sort of memory that only works backwards" - Lewis Carroll
Received on Thu Jan 07 2005 - 18:36:52 EST

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