Our attempts to breed dogs with specific traits has had
its drawbacks. Often, selective breeding of dogs leads to health problems. Dogs bred to be big have a tendency to
overheat, and the weight on their bones makes them more susceptible to bone
diseases and bone cancer. Bulldogs have heads so big that they all have to be
born by Caesarean section. Bassett hounds have immune system problems and blood
dyscrasias - selective breeding has gone to the dogs.
A new study shows that health problems selective breeding in
dogs may have a bright side. Chiari malformation occurs when the bones of the
skull fuse too early and parts of the brain are forced through the base of the
skull. It occurs in Griffon Bruxellois dogs at a shockingly high rate, but also
occurs in humans.
One in 1000 people is afflicted with some degree of Chiari
malformation (some are symptom free), yet the causes of this defect remain
obscure. Studying the genetics in selectively bred dogs may help to identify genetic
markers in humans.
Does this mean that all selective breeding is laden with
problems? No - a relatively new dog breed called the Jagdterrier, or German
Hunt terrier, is disgustingly healthy. Who do we have to thank for this marvel
of selective breeding – the Nazis, oh great.
The hunting group of dogs at the time was well represented by the
American Bloodhound and the four breeds of foxhound. Also at the time, terriers
were at the height of their popularity. A terrier won the first Westminster dog
show in 1907, and won eight of the first eleven shows.
So two brothers in Germany, Lutz and Heinz Heck, decided to
breed a genetically and functionally superior German hunting dog, and to make it a terrier. Lutz was
the curator of the Berlin Zoo and was no stranger to selective breeding in the
name of German national pride, but more on that in a moment.
The two brothers were good friends with anyone high in the German
government that they though they could suck up to. Lutz was very close to Herman
Goering, and both brothers knew and were friends with Adolph Hitler. Hitler didn't
fund their program as far as it is known, but the brothers used their connections in the
Nazi party to procure patrons and partners.
The Heck brothers used the Welsh Terrier, the Old English Terrier
and the Fox Terrier to start breeding toward the perfect hunting dog, but they
needed the German blood, so they included a pinch of Pinscher and Dachshund as well.
They wanted to end up with a dog that could run a fox to ground (chase it
underground into its den), but was strong and nasty enough to take on bears.
What they ended up with is the Jagdterrier, a breed finalized some
years after the fall of the Reich.
Unfortunately, the German Hunting Dog was a victim of poor
planning. We now have a dog that is too big to chase a fox into a den, but too
small to take on a bear with any hope for survival. On the plus side, they
don’t seem to have suffered from their selective breeding history – no health
problems here, nothing to see, move on.
The brothers Heck didn’t stop there. They also used
selective breeding to try and bring back an ancient cattle breed that wandered
Europe a thousand years ago. Called the aurochs, this is the bovine
immortalized in cave paintings across Europe – the supermodels of the Neanderthal period.
As opposed to the selective breeding of the Jagdterrier that was designed to a functional end, the breeding of the bovine was
basically an attempt to generate an animal that looked like the picture; sculpting in
live medium. A recent study has sequenced the aurochs mitochondrial genome
using museum pieces, but my guess is that the modern day Heck Cattle, as they are
called, will bear small genetic resemblance to the ancient breed.
For a guy who supposedly loved and worked with animals for
conservation purposes, Lutz Heck turned out to be one nasty guy. In 1941, after
the fall of Warsaw to the Nazis, Heck looted all the exotic animals from the Warsaw Zoo and took
them back to Germany. For the remaining animals, he invited his SS friends to
have a private hunt and slaughtered them in and out of their pens – a massacre. Not such a great advertisement for the Nazis, who claimed to be such advocates for animal rights.
Contributed by Mark E. Lasbury, MS, MSEd, PhD
As Many Exceptions As Rules
German Colonialism: Race, The Holocaust, and Post-War Germany. edited by Volker Max Langbehn, Mohammad Salama. New York, Columbia University Press, 2011.
The Zookeeper's Wife. Diane Ackerman. New York, W.W. Norton, 2007.
Lemay P, Knowler SP, Bouasker S, Nédélec Y, Platt S, Freeman C, Child G, Barreiro LB, Rouleau GA, Rusbridge C, & Kibar Z (2014). Quantitative trait loci (QTL) study identifies novel genomic regions associated to Chiari-like malformation in Griffon Bruxellois dogs. PloS one, 9 (4) PMID: 24740420
Zeyland J, Wolko L, Bocianowski J, Szalata M, Słomski R, Dzieduszycki AM, Ryba M, Przystałowska H, & Lipiński D (2013). Complete mitochondrial genome of wild aurochs (Bos primigenius) reconstructed from ancient DNA. Polish journal of veterinary sciences, 16 (2), 265-73 PMID: 23971194
Contributed by Mark E. Lasbury, MS, MSEd, PhD
As Many Exceptions As Rules
German Colonialism: Race, The Holocaust, and Post-War Germany. edited by Volker Max Langbehn, Mohammad Salama. New York, Columbia University Press, 2011.
The Zookeeper's Wife. Diane Ackerman. New York, W.W. Norton, 2007.
Lemay P, Knowler SP, Bouasker S, Nédélec Y, Platt S, Freeman C, Child G, Barreiro LB, Rouleau GA, Rusbridge C, & Kibar Z (2014). Quantitative trait loci (QTL) study identifies novel genomic regions associated to Chiari-like malformation in Griffon Bruxellois dogs. PloS one, 9 (4) PMID: 24740420
Zeyland J, Wolko L, Bocianowski J, Szalata M, Słomski R, Dzieduszycki AM, Ryba M, Przystałowska H, & Lipiński D (2013). Complete mitochondrial genome of wild aurochs (Bos primigenius) reconstructed from ancient DNA. Polish journal of veterinary sciences, 16 (2), 265-73 PMID: 23971194
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