Dear Yobe,
One approach to estimating genetic trends is to calculate the
average EBV for cows born in a particular year. This approach
assumes you have EBV's for all (or a random [unselected] sample)
of animals and have estimated them in an animal model over several
generations. This would be a two stage apporaoch
and care must be taken that changes in management over time do not
bias the results.
Arthur
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> From: "yobe mtonga" <r991m909x@hotmail.com>
> To: asreml@chiswick.anprod.csiro.au
> Subject: Genetic trends
> Date: Mon, 04 Sep 2000 10:34:30 CAT
> Mime-Version: 1.0
>
> This is the firs time that I am using asreml. I need some advise on how to
> obtain genetic trends on milk yield.
> I will appreciate your help.
> yours
> Yobe
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Arthur Gilmour PhD mailto:Arthur.Gilmour@agric.nsw.gov.au
Principal 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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