Re: Coding covariance

Assuming you want to model lay date as a shraed trait between both
parents, you probably want to associate both Female and Male identities
with your pedigree file (!P) and then you could could set up the model
something like:

#############################
Laydate ~mu !r !{Female Male!}

1 1 1
0 0 ID 0.1 !S2==1

Female 2
2 0 US
0.1 #female additive variance
0.01 0.1 #female-male covariance, male additive variance
Female !AINV
###############################

Best,

Alastair

CT wrote:
> Dear all,
>
> I would like to analyse data for pairs of individuals like Female Male
> LayingDate, and get the additive genetic covariance between males and
> females. I was told I could use the !{Female Male!} specification, but
> in the output there is no covariance. So I guess I need to describe
> the structure of the G matrix, but I'm not sure how to do that.
>
> Could anyone help?
>
> Many thanks in advance
>
> All the best
>
>
>
>
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-- 
Alastair J Wilson 
NERC Research Fellow
Alastair.Wilson_at_ed.ac.uk
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