Re: RC: Re: Breeding theories (was *Muscat)

[Peggy Rinehart <rubyjwl@cts.com>]

Heidi,

Interesting opinion.  Perhaps there is anecdotal evidence to support a
breeding program such as you describe.  I'm not aware of any scientific
evidence that "breeding extremely old mares to young stallions 
and extremely old stallions to young mares" can improve chances of a
successful outcome.  Even the most successful (by any criteria, whether it's
conformation, performance, disposition, color, whatever) breeding program is
subject to chance.  When you combine the genetic material from any two
individuals, the possibilities are impossible to predict or enumerate.  At
best you can make an educated guess, then play the odds.  I don't think that
using genetic material from elderly mares or stallions does anything to
improve the odds of a good outcome.

Peggy Rinehart
Ramona, CA

At 08:54 PM 9/11/99 EDT, you wrote:
>In a message dated 9/11/99 2:29:53 PM Pacific Daylight Time, rubyjwl@cts.com 
>writes:
>
><< Those who may have elderly mares and stallions who are producing wonderful
> foals, please do not take offense.  While it is certainly possible for any
> mammal of reproductive age to have normal offspring, the odds of having an
> unintended, or undesired outcome increase with advanced maternal and
> paternal age. >>
>
>Because many of these abnormalities, if minor, will not be expressed if there 
>is a normal gene from the opposite chromosome, one often has better chances 
>of a successful outcome by breeding extremely old mares to young stallions 
>and extremely old stallions to young mares.
>
>Heidi
>
>


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