
2) First generation Labradoodles are the product an awesome phenomenon called “Hybrid Vigor.”
I won’t put you to sleep with a complex,
at length, discussion of genetics and Hybrid Vigor, so please keep in mind this
is a very simplified explanation.
As you know, pure bred dogs can suffer from
genetic health issues that are usually breed specific (hip dysplasia, Canine
Dwarfism, etc.) This is because pure bred
dogs have a high level of relatedness, and a low level of genetic variation. This creates an environment ripe for the expression
of bad recessive genes (bad traits like hip dysplasia). However, when you cross two different breeds that
have different problems, it opens the gene pool back up and hides the bad
recessive traits under the dominant good genes from the other breed. This is the phenomenon of Hybrid Vigor. The
longer that these breeds have been isolated in their own genetic pool, and the
greater the genetic differences between the two breeds, the stronger the
resulting Hybrid Vigor will be. This
creates a dog with fewer problems. Hybrid
dogs live longer, go to the vet less, are more fertile, and are more mentally
stable.
Basically, you start with really two awesome
breeds and combine them. The resulting progeny
will have fewer health problems and better temperament than either of the
starting breeds. Plus, in the specific case of the Labradoodle, you might even
luck out and get expression of those no-shed genes.
Keep in mind that if a health issue is shared by both breeds, Hybrid Vigor will not help eliminate that problem (i.e. hip dysplasia). That is why it is always important to make sure the proper health testing has been done!
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