Re: pedigree and GxE analysis

Dear Ky (and ASReml users)

Helena Oakey is doing a PhD in BiometricsSA at the University of
Adelaide (supervisors are Brian Cullis, Wayne Pitchford and me!) on
incoporating pedigree information in such analyses and is currently
writing two papers on her research.

Regards

Ari

Ky Mathews wrote:
>
> 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
> Ky
>
> 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
> Email: ky.mathews_at_csiro.au
>
> "Its a poor sort of memory that only works backwards" - Lewis Carroll

--
Assoc. Prof. Ari Verbyla,
BiometricsSA,
School of Agriculture and Wine,
University of Adelaide,        International:
and SARDI                             Phone: +61 8  8303 6760
Private Mail Bag 1,                   Fax:   +61 8  8303 6761
Glen Osmond,                      Australia:
South Australia, 5064,                Phone:    08  8303 6760
AUSTRALIA.                              Fax:    08  8303 6761
Email:    Ari.Verbyla_at_adelaide.edu.au
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