Dear Carlos
Welcome to the ASREML list.
I trust you have access to someone with a good understanding wwith which
to discuss these things. It is usually quite hard doing it alone.
Let me assume you have arranged your data with 3750 records and 4 columns
we will label Set Fam Rep DBH
where DBH is the response and Set contains numbers 1:10, Fam contains 1:250
and Rep contains 1:15
I'll assume no missing values.
Your real file may have many more columns and have them in any order.
The basic ASREML job would be
Carlos trial - First run
Set 10
Fam 250
Rep 15
DBH
carlos.dat
DBH ~ mu !r Set Fam Rep.Set
However, I am confused by this model as to the actual layout.
You say single tree plots. I presume the Replicates are laid out as blocks
and that the 250 families are randomised within Reps. Therefore
I would expect to include Rep also in the model because Rep.Set
is an error term not meant to take out blocking effects.
Anyway. Once you have gone this far, you could consider fitting
a spatial error term to e, fitting trends to remove spatial effects,
or blocks (spatial modelling preferred by us).
Or moving in another direction, look at multivariate analysis.
However, have a good read of the manual. It is pointless me trying
to abbreviate what is already there.
Arthur
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> From: "rhmartin@idecnet.com" <rhmartin@mail.idecnet.com>
> To: asreml@ram.chiswick.anprod.csiro.au
> Date: Thu, 18 Feb 1999 12:07:02 +0000
> MIME-Version: 1.0
> Subject: Getting help
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>
> My name is Carlos. I´m from Argentina and I´m working in
> forestry.
> At the moment I´m in Spain and I would like to join the
> discussion group´list.
> I´m trying to use Asreml in progeny trials in order
> to rank genotypes but I´havent enough experience. I´d like to
> get the Asreml linear model for an open pollinated progeny
> trial planted according to the following model:
>
> y = mu + Set + Set*Rep + Fam(Set) + e
>
> where: Set=provenances (random)
> Fam=families (random)
> Families are nested within sets.
> I need components of variances for this model in order to calculate
> heretability, gain and rank families.
>
> I have 250 families in a single tree plot design with 15
> replications. There are 10 sets with 25 families each. The total
> number of trees is 3750.
> Thanks.
> I am looking forward to your reply.
> --
> Asreml mailinglist archive: http://www.chiswick.anprod.csiro.au/lists/asreml
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Arthur Gilmour PhD email: Arthur.Gilmour@agric.nsw.gov.au
Senior Research Scientist (Biometrics) fax: <61> 2 6391 3899
NSW Agriculture <61> 2 6391 3922
Orange Agricultural Institute telephone work: <61> 2 6391 3815
Forest Rd, ORANGE, 2800, AUSTRALIA home: <61> 2 6362 0046
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