Did You Know?
Do you know where the first horses appeared?
The first horse – Eohippus, the Dawn Horse was about the size of a large tomcat.
It appeared in North America 40 + millions years ago. It had toes, no hoofs yet
and lived in a tropical forest setting.
Posted Feb 16, 2017 - Ref.
"The History & Romance of the HORSE" by Arthur Vernon
DSLD is not a Disease
Posted Apr 7, 2014
Journal of Equine
Volume 29, Issue 10 , Pages 748-752, October 2009
Systemic Proteoglycan Deposition Is Not a Characteristic of Equine Degenerative
Suspensory Ligament Desmitis (DSLD)
Daniel Schenkman, DVM, PhD,
Anibal Armien, DVM, PhD,
Roy Pool Jr., DVM, PhD,
James M. Williams, PhD,
Ronald D. Schultz, PhD,
Jorge O. Galante, MD
Recently Degenerative Suspensory Ligament Desmitis (DSLD)
has been proposed to be a disease characterized by systemic deposition of
proteoglycan (PG) in connective tissues. To investigate this hypothesis, 6
clinically affected Peruvian Paso horses were compared to 2 unaffected
quarterhorses and one unaffected standardbred. Histological sections of limb
ligaments and tendons, nuchal ligaments, aortas, hearts, eyes, visceral organs
and brains from both groups were stained with H&E as well as special stains for
PG. Safranin-O stained sections were found to be optimal for elucidating the
presence of PG. Although lesions characteristic of DSLD were present in
suspensory ligaments of each clinically affected horse, including foci of
chondroid metaplasia with abundant PG, a similar but less pronounced pattern of
PG deposition was present in control horses. In contrast to findings of the
previous study, PG deposition was not unique to DSLD horses, and PG deposition
in aortas and nuchal ligaments of some control horses exceeded levels of PG
present in similar tissue of DSLD horses. Furthermore, the “vascular lesion”
described in the media of arteries as cellular separation and intercellular
amorphous matrix deposition was within the spectrum of changes recognized in
both affected and unaffected horses. We found no evidence that DSLD is a
systemic PG deposition disease.
The Peruvian Horse tests positive for
Posted Jun 10, 2013
For several years
now the complete horse genome data has been available to equine genetic
researchers all over the world. They have been able to discover some surprising
facts about domestic horses and more specify about the genetic make-up of
Peruvian Horses. The fact that the Peruvian horse has a larger more diverse gene
pool than many other breeds, like the American Quarter Horse, or the
Thoroughbred, or Arabians or even Tennessee Walkers may come as a surprise to
many, but the Peruvian Horse has one of the largest, most diverse gene pools of
any domestic horse in the world.
A large breed population does not guarantee a large gene pool. The
Thoroughbred is a large population that is widely distributed around the world,
however, historic records suggest that one sire is responsible for 95% of the
paternal lineages in the breed and as few as 30 females make up 94% of maternal
lineages. In addition the outside gene flow of the Thoroughbred has been closed
since 1791. The fact that the Conquistadors primarily rode stallions when
conquering Peru may help to explain the large number of sires and the diversity
of the present day gene pool of the Peruvian Horse. Also unlike the
Thoroughbred, new genetic diversity has been added as recently as the 1960's.
With the entire genome complete, every single gene and gene variants or
modifiers called alleles, can be identified and be compared with other breeds.
Researchers have found the gene for just about everything, including the gene
for gait. When comparing the Peruvian Horse with other gaited breeds they have
discovered that the Peruvian Horse tests stronger over a longer genetic range.
This means with its ancestral connection to the ambling horse of the Iberian
Peninsula, the Spanish Jennet, the Peruvian Horse is predisposed to gait like no
Why is any of this important? As a general rule, the bigger the gene pool
is, the better things are for a breed. Diversity tends to encourage a strong
breed hardiness. When a population is not very diverse, mutated alleles can
become amplified and dominant, and this can lead to some very dangerous problems
for a small gene pool population.
Gene pools should be of interest to Peruvian horse breeders for a number
of reasons. A diverse set of genes is desired to create a healthy population of
breeding animals. This diversity will also help defend it against genetic
diseases and this may be the reason why no major genetic disease has ever been
discovered in any concentration of Peruvian Horses. This knowledge is especially
important for any breeder who works with purebred horses, as purebreds tend to
develop issues associated with inbreeding due to restrictions on the animals
allowed to breed. These issues become less of a factor when the gene pool is as
large and diverse as the gene pool of the Peruvian Horse. The Peruvian Horse is
not only one of the best-gaited horses in the world; it is also one of the
strongest horses genetically.
We try to change this page monthly so come back for more interesting stuff.
If you have any really interesting Peruvian Paso facts or information that is horse
related, we would like
to post it here. Please e-mail your information to us. Your info should be verifiable and you will receive full credit for the
submission if you wish. You can email your submissions here: firstname.lastname@example.org