Re: Mean of breeding values different from 0 / covariance issue

Dear Tommy,

1) BLUPs do not in general sum to zero if there is a correlation structure as in a genetic analysis.

2) The coding is missing a line and should read.

1 2 4
0 # Added
Trait 0 US
3*0

Trait.ID 2
Trait 0 US
3*0
ID 0 AINV # Added

Trait.ide(ID) 2
Trait 0 US
3*0
ide(ID) # Added

Trait.YearBirth 2
Trait 0 US
3*0
YearBirth # Added

Trait.Year 2
Trait 0 US
3*0
Year # Added

However, these last two may not be able to be fitted unless there are
quite a few Years and YearBirth levels. I would normally
fit Trait.Year as a fixed effect (although you may have valid reasons for not doing so).

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

Retired Principal Research Scientist (Biometrics)

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Received on Fri Apr 09 2009 - 05:47:11 EST