Re: multivariate genetic analysis using SPLUS asreml

Sorry, but what is Brian's response?
Sincerely,
Derek

---- Original message ----
>Date: Thu, 18 Oct 2007 12:55:31 +1000
>From: brian.cullis_at_DPI.NSW.GOV.AU
>Subject: Re: multivariate genetic analysis using SPLUS
asreml
>To: ASREML-L_at_AGRIC.NSW.GOV.AU
>
> see below
> Brian Cullis
> Research Leader, Biometrics &
> Principal Research Scientist
> NSW Department of Primary Industries
> Wagga Wagga Agricultural Institute
>
> Professor,
> Faculty of Agriculture, Food & Natural Resources
> The University of Sydney
>
> Phone: 61 2 6938 1855
> Fax: 61 2 6938 1809
> Mobile: 0439 448 591
>
>arthur.gilmour_at_DPI.NSW.GOV.AU To ASREML-
L_at_AGRIC.NSW.GOV.AU
>Sent by: ASReml users
cc
>discussion group Subject Re: multivariate
genetic
><ASREML-L_at_AGRIC.NSW.GOV.AU> analysis using
SPLUS
>
asreml
>18/10/2007 11:31
AM
>
>+-----------------------------+
>| Please respond to |
>| ASReml users discussion |
>| group |
>| <ASREML-L_at_AGRIC.NSW.GOV.AU> |
>+-----------------------------+
>
> Dear Derek,
> I understand your main issue wanting to calculate
> the genetic correlation and its standard error.
> As we noted separately, ASReml-S does not appear to
> have the equivalent of ASRemls .vvp
> file. However, in the case of a multivariate model,
> the approximate variance for the
> variance parameters is just the inverse of the AI
> matrix which you do have.
> You seem to be saying though that you havn't
> properly sorted the function to calculate the SE
> of the derived correlation.
> One work around is to parameterise the variance
> model so that the correalation is directly
> estimated. Then, its SE will be easily derived from
> the Z-ratio
> I'm expert in ASReml rather than ASReml-S, but it
> should just be a matter of
> replacing us(trait) with corgh(trait).
> *******yes this is correct!
> The model is equivalent, so you should be able to
> see the connection.
> On the other issues, I support Brian's comments.
>
> May Jesus Christ be gracious to you,
>
> Arthur Gilmour, His servant .
>
> Mixed model regression mapping for QTL detection in
> experimental crosses. Computational Statistics and
> Data Analysis 51:3749-3764 now available at
> http://dx.doi.org/10.1016/j.csda.2006.12.031
>
> Profile: http://www.dpi.nsw.gov.au/reader/17263
> Personal website: http://www.cargovale.com.au/
>
> mailto:Arthur.Gilmour_at_dpi.nsw.gov.au,
> arthur_at_cargovale.com.au
> Principal Research Scientist (Biometrics)
> NSW Department of Primary Industries
> Orange Agricultural Institute, Forest Rd, ORANGE,
> 2800, AUSTRALIA
>
> fax: 02 6391 3899; 02 6391 3922
> Australia +61
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>
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Derek Roff,
Department of Biology,
University of California,
Riverside,
CA 92521
USA
Received on Sun Oct 17 2007 - 20:11:06 EST