The Key Ingredients:
NICKS - INBREEDING - THE
BOTTOM LINE - PHYSICAL CONSONANCE
To yield a high percentage of
prosperous matings, every relevant piece of information
available must be taken into consideration. The strength of a pedigree is
determined by the sire and dam, and by the correct combinations
of familial influences. Pedigrees can be upgraded by the
incorporation of recognized positive nicks and inbreeding. The
female family of the sire should not be dismissed in this
pursuit. Physical consonance is a
powerful, yet sometimes overlooked element. The principles
involved are useful in the evaluation of any horse.
Nicks

The affinity of a sireline for producing superior
runners when crossed with a particular broodmare sireline is
referred to as a "nick". Nasrullah line stallions with
Princequillo line mares, Blushing Groom with Nijinsky, and Mr
Prospector with Northern Dancer are examples of popular
recognized nicks.
The most
reliable nicks for a stallion are those which are determined by
his own offspring. If a stallion has no foals of racing age,
his nick may be best determined by examining the production of
similarly bred stallions by the same sire.
See "Beyond
the Basics" for information regarding Jack Werk Nick
Ratings.
Inbreeding
and Linebreeding
The
purpose of inbreeding is to pass on to the foal desirable traits
or influences of ancestors through genetics.
Genes are
strands of DNA, which determines the physical characteristics of
a horse. Two copies of a gene are given to an embryo. One copy
from the mother, and the other from the father. When the DNA
for both copies is identical, the offspring will always possess
the resulting trait. Inbreeding increases the probability that
identical copies of desirable genes from common ancestors will
be passed onto the foal through the mother and father.
Most individuals
carry both dominant and recessive genes. The dominant genes
override the recessive, and are expressed physically.
Desirable genes are usually dominant. Problems arise when
closely related individuals who carry the same undesirable
recessive gene are mated. This greatly increases the chance of
exposing the unwanted physical trait. A prime example is
inbreeding to Raise A Native.
Raise A Native
inherited two copies of a recessive gene for weak ankles. A
champion racehorse at two, his racing career was abruptly cut
short due to ankle problems. The unwanted recessive genes did
not interfere with his success as a sire, however, because his
mares supplied a dominant gene which masked the unwanted gene.
He sired two champions and 78 stakes winners, including sire of
sires Mr Prospector. But inbreeding to Raise A Native can cause
problems, especially if the inbreeding is close. If a Raise A
Native line mare carrying this particular recessive gene is
mated to a Raise A Native line stallion who also carries it, the
resulting foal will have a dramatically increased probability of
having ankle problems.
To be effective,
inbreeding must be done on a highly selective basis. Certain
horses have proven to be very reliable for inbreeding purposes.
Among those are Northern Dancer, Turn-to, Princequillo,
Somethingroyal, and Almahmoud.
Successful
inbreeding can lead to prepotency, a term used to describe the
ability of a stallion or mare to predictably stamp a foal with
desirable characteristics. This ability comes from the
inheritance of identical copies of desirable genes.
Linebreeding is
a more conservative form of inbreeding. Generally, inbreeding
refers to the duplication of ancestors in the first five
generations. Duplication of ancestors in linebreeding may be
further removed. Since the individuals to be mated are not as
closely related, the chances of recreating undesirable traits
are somewhat diminished.
The
Bottom Line
Great broodmares
have contributed many positive attributes to their offspring.
The strong influence of broodmares is a major consideration in
the selection of stallions to stand at Key Ranch. Through
Uncle Abbie, we have the chance to inbreed to Missy
Baba, dam of Sauce Boat and Raja Baba. Miss Disco, third dam to
Wajir, was Broodmare of the Year in 1958 and dam of Bold
Ruler.
Wajir
is the only stallion standing in North America who traces
tail-female to Miss Disco, the dam of legendary Bold Ruler.
Ample opportunity exists for inbreeding to Miss Disco through
Bold Ruler, but sex-balanced inbreeding must be through a
daughter and a son. Wajir uniquely provides Miss Disco as a
female component for sex-balanced inbreeding. This is an
excellent opportunity for Bold Ruler line mares. Wajir has two
half brothers at stud. African Dancer, by Nijinsky II, stood
his first year at stud in 1999 in Chile. Touching Wood, by
Roberto, stands in New Zealand.
Physical
Consonance
The horse has many angles and points which
are used to evaluate conformation. Proper balance is achieved
when these angles and points complement one another.
Affirmed
Northern Dancer
Observe the
above pictures of Affirmed and Northern Dancer. Both horses are
physically correct and well-balanced, yet have completely
different overall appearances. Which horse is better? Tough
call. Affirmed is our most recent Triple Crown winner.
Northern Dancer won the Kentucky Derby and the Preakness, and
was the most influential sire of the 20th century.
Now envision
Affirmed with Northern Dancer's rear end (or vice versa).
Doesn't quite work, does it? The differing angles do not
complement each other, and the hypothetical horse is thrown off
balance.
A prepotent
stallion or mare will stamp a foal with particular physical
traits - some are desirable traits, while others are not.
Knowing what to expect from a stallion and/or mare in this
regard is a real advantage. For example, a mare with an
excellent shoulder who lacks the hip to go with it can be bred
to a stallion who will impart the necessary hip to the foal. Or
a mare who produces foals with offset knees can be bred to a
stallion who corrects them.
To produce a
correct and well-balanced foal, the physical strengths and
weaknesses of both parents must be evaluated. The appropriate
stallion will improve a mare through her foal.
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