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Horse Articles :: Tobiano Paint Horse
The Tobiano (pronounced: tow be yah' no). The Tobiano coat
pattern is governed by a dominant gene, meaning that there
only needs to be one copy of the gene for the tobiano coat
pattern to be present. Homozygous refers to having identical
alleles for a single trait. Homozygous: (Ho mo zi gus) means
two copies of the same gene. Horses that are homozygous for
the tobiano gene will have two copies of the tobiano gene,
one inherited from each parent. A horse must have two tobiano
parents to have inherited two tobiano genes. If the foal gets
a tobiano gene from each parent this means the foal will be
homozygous for tobiano. Only genetic testing will tell you
more conclusively that the horse is homozygous for the Tobiano
gene. Most labs only require you to collect sample by pulling
(do not cut off) 20 30 mane or tail hairs with roots attached.
This test is necessary because a lot of the times the value
of the horse will go up if he/she is tested to be homozygous
for tobiano gene. Especailly if this is a breeding stallion
this test is important because many people do not want the
gamble of getting a solid colored foal if they can breed to
a stallion that will be a guaranteed color producer. If the
sire is tested homozgyous tobiano and the dam is also tested
homozygous tobiano then normally a test is not needed if you
can prove that both the sire and dam have been tested.
The white on the body will generally cross the topline of
the horse. Tobiano Paint Horses have the most common spotting
pattern, characterized by rounded markings with white legs
and white across the back between the withers and the dock
of the tail, usually arranged in a somewhat vertical pattern.
The head usually dark and with markings like that of a normal
horse. i.e. star, snip, strip, or blaze. The body can be many
different color patterns but again normally will have white
legs. If the Tobiano Horse is Homozygous Tobiano (will always
produce a spotted foal) the pattern may have what we call
“paw prints” or lots of small black spots within the white.
See photos below of a weanling homozygous tobiano paint colt
and a homozygous tobiano paint stallion.
The tobiano pattern in horses and ponies appears to be inherited
as a simple dominant gene. A spotted foal can be produced
by a tobiano x non tobiano mating, but never from a non tobiano
x non tobiano mating. Tobiano foals with only one spotted
parent will not breed true for tobiano because they have received
a Not tobiano gene from their solid parent that they will
pass on, at random, to half of their progeny. The mating between
two tobianos can produce true breeding (homozygous) tobiano
horses. Breeders that can recognize homozygous horses may
use them to breed so that every foal has the tobiano pattern.
The tobiano coat pattern gene in the Paint or Pinto horse
is a dominant gene, whereas, the overo coat pattern has a
recessive gene. The tobiano paint horses can consist of just
about any color, size and shape. Any breed of horse can be
homozygous tobiano as long as you have the tobiano gene from
each parent. No more worries about getting that solid colored
foal with breeding homozygous tobiano horses. We need to make
sure we don't sacrafice the quality when wanting to breed
homozygous tobiano horses and make sure that they have the
quality needed along with the color guarantee. Breeding for
quality should be your top priority and the color is always
J & J Paints and Quarter Horses offer Horses For Sale In
Wisconsin. For more info visit: http://www.jjpaintsandquarterhorses.com/