[ SHOWGSD-L ] Re: DNA markers - How will you use them?
- From: "Carolyn" <marhaven@xxxxxxx>
- To: <Gsdman2@xxxxxxx>, <showgsd-l@xxxxxxxxxxxxx>
- Date: Wed, 1 Dec 2004 23:17:47 -0800
I think none of us will know the answer to that until we are able to sit down
and
find out what our bitch's problems are and start there before we ever begin to
look for a stud. We may all switch bloodlines and stock.......who knows. <G>
We may just set our hearts and hope in the line we are already working with as
it
may be no better and no worse than others, but we are familiar with what we get
in type and temperament and quality.
In these conversations about breeding it always seems to be where we will find a
stud that won't give us problems. We need to start with our bitches and what
problems they are producing before we start insisting the stud be free of all
problems. We will likely go into a breeding with more knowledge....but it will
still
take the actual breeding, and choosing something from the results, to see what
bullets we dodged and which new wounds we picked up along the way to know.
As we work to solve some problems we will surely lose some good things along
the way. Doesn't sound a lot different than it already is does
it...............<G>
Carolyn marhaven@xxxxxxx
http://www.marhaven.com/bookerskids.htm
----- Original Message -----
From: <Gsdman2@xxxxxxx>
To: <showgsd-l@xxxxxxxxxxxxx>
Sent: Wednesday, December 01, 2004 7:07 PM
Subject: [ SHOWGSD-L ] DNA markers - How will you use them?
> Carolyn wrote:
> <<We cannot utilize the DNA markers if we don't have them.>>
>
> We should be concerned about the day that we actually do have DNA markers
> available. Certainly this will be a great tool for a breeder, but are
> breeders
> prepared to use it correctly?
>
> Imagine if you had this available today? Imagine that you could look at test
> results and see every potential problem a sire or dam might pass on. Any
> breeder who's been around for a while knows that there are no clean lines.
> Every
> dog carries the potential to produce a variety of problems. That will not
> have changed by the time you are offered these miraculous tests. So ... What
> will you do when you have that telling computer printout in front of you as
> you
> try to decide which stud dog to breed your bitch to? It is a simple thing to
> say that you will breed only to the dog with the fewest problems, but perhaps
> you should think a little deeper than that?
>
> Ideally, you will breed your bitch to a stud dog that does not have the
> potential to produce the same problems that she might. Assume for a moment
> that
> your bitch carries three considerable problems. Now, you breed her to a male
> that also only carries three considerable problems, none of which mirror those
> of your bitch. Assuming all of these problems are recessive traits, wouldn't
> that be the best breeding you could do to produce puppies without problems?
> The logical answer to this is yes, but it depends on whether or not you are
> considering the resulting progeny's potential to produce problems. If we are
> talking simple recessives (which in itself is very unlikely), the resulting
> progeny
> should not exhibit any of those six problems, but it is possible that some,
> or all, will carry all of those six bad genes given by their parents. Would
> you feel like you made progress in your breeding program in that situation?
>
> There is still time, perhaps decades, to decide what you will do with DNA
> markers when they are finally available to breeders. I think it would be a
> mistake to just hear the phrase and blindly believe that they will be an
> instant
> cure for all of our breed's woes. Markers will be a tool, and perhaps a very
> useful one. However, even a screwdriver is useless unless you know which end
> goes into the screw, and what to do after that.
>
> Tom Langlitz
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