WITH ENGLISH TRANSLATIONS
|BEI FUSS (FOOSS)
||FETCH (RETURN TO ME)
|GIB LAUT (GEE BLOUT)
BREED VALUE ASSESSMENT NUMBER
The HD ZW value factors in many variables in the calculation,
but is based mostly on the hips status of a dog's progeny.
This is the critical in the usefulness of the HD ZW. The dog's
own hip status is only one of several important variables
in the equation, not the sole determinate. This is because
it is possible for a dog with excellent hip status to produce
a number of progeny with HD and conversely, a dog with fair
hip status can produce a majority of progeny with excellent
hip status. Without factoring in this critical look at the
dog's Genotype (what his genes pass on to progeny) in addition
to his Phenotype (what his actual hip status is), real progress
cannot be made in reducing the incidence of HD.
So how does it work? Each dog registered with the SV is assigned
an HD ZW number at birth, based on its parents HD ZW numbers.
After a dog is x-rayed, its own hip status is factored into
his HD ZW. Upon producing progeny of his own, the results
of the progeny's x-rays are then factored into the parents
HD ZW numbers. The HD ZW number is not a static value. It
fluctuates depending on what the dog produces! This is what
is important: A dog's Genotype, what the dog produces. Not
his Phenotype, what his actual hip status is.
An HD ZW value of 100 has been set as the breed average.
HD ZW values less than 100 mean the dog produces fewer progeny
with HD that the breed average. A number greater than 100
means a dog produces HD more often that the breed average.
So HD ZW values less than 100 are desirable. However, the
focus must still be on the total dog. Breeding decisions need
to include much more than only a dog's HD ZW! Working ability
and temperament are the most important.
To allow this, the SV requires that the calculated HD ZW
for progeny of a desired mating be 100 or less. So a female
with an HD ZW of 80 can be bred to a male with an HD ZW number
as high as 120. The pups of a breeding like this would be
assigned HD ZW values of 100 at birth. So HD ZW values less
than 100 are just not desirable, they offer greater options
in breeding partners. Additionally, stud dog owners can prove
their dog's prepotency by accepting breedings to females with
high HD ZW values.
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