377 Chesbro Road   Pennellville, NY 13132

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Click here to find what color your foal will be.


TERMINOLOGY RELATED TO COAT COLOR GENETICS:

GENE:  The genetic coding or DNA sequences that determine horse coat color. These 'Genes' are located on strands of protein located in the nuclei of cells.

GENOTYPE:  What the genes or specific genetic coding is.

PHENOTYPE:  What the horse actually looks like.

HOMOZYGOUS/HETEROZYGOUS:  Refers to the gene pairs at a specific location on the protein strand. If the genes are identical, they are Homozygous. If the genes are different, they are Heterozygous.


HOMOZYGOUS BLACK EXPLAINED:

Black And Red are the two basic pigment colors of the horse. Black is dominant. Red is recessive. The Black and Red pigment genes or the "E" Genes are symbolized as follows:

BLACK (DOMINANT):
EE - HOMOZYGOUS BLACK
Ee - HETEROZYGOUS BLACK

RED (RECESSIVE):
ee - HOMOZYGOUS RED

Each horse possesses one pair of "E" (Extension) genes or, basic pigment color genes. The offspring that result from the mating of two horses inherits one basic pigment color gene from each parent. Currently there is a DNA-based test called the Red Factor Test, which will determine which genes are present. See the VGL-UC DAVIS RED FACTOR TEST for additional information.

A Homozygous Black (EE) can only pass on the dominant "E" black gene, while the Heterozygous Black (Ee) is able to pass on either the dominant black gene "E" or the recessive red gene "e". A horse must inherit the recessive "e" gene from each parent to be red. Therefore, it is genetically impossible for a Homozygous Black to produce a red foal since there is no recessive red "e" gene to pass on.

Other coat color variations and shades of color occur as a result of the effects of separate, "modifying" genes located at other "spots" or "loci" on the DNA strand. For example, the "A" (Agouti) gene effects the expression of black coat color in horses at times. The "A" gene does not visibly effect red horses since there is no black pigment.


    A (Dominant) - Causes the black pigment to be restricted to the points of the horse (mane, tail, legs) with red expressed across the rest of the body. The horse is Bay.

    a (Recessive) - Does not restrict the black pigment. The black color is fully expressed across the entire body. The horse is black.

A Homozygous Black (EE) horse will always produce black offspring, not bay, when mated with a sorrell/chestnut whose sire and dam were both black. A black crossed with a black will always produce a black, not bay, if at least one parent is Homozygous Black (EE). If both sire and dam are Heterozygous (Ee), the chance of a black offspring is 75% with a 25% chance for red.

More in depth information regarding Homozygous Black and Horse Coat Coloration can be found at UC DAVIS-HORSE GENETICS web site.

    To see what color your foal will be when mated with Black Shaadow, Homozygous Black Arabian Stallion, See chart


Based on the principles of genetics.

SIRE: BLACK SHAADOW (EE,aa)
HOMOZYGOUS BLACK ARABIAN STALLION


        COAT COLOR OF MARE       COAT COLOR OF FOAL
        BLACK                                      BLACK
        BAY                                            BLACK OR BAY
        CHESTNUT/SORRELL           BLACK OR BAY
        GREY                                         GREY OR *NON-GREY
        PALOMINO                              BLACK, BAY, BUCKSKIN
        BUCKSKIN                               BLACK, BAY, BUCKSKIN
        GRULLA                                   BLACK OR GRULLA
        WHITE                                      WHITE OR *NON-WHITE
        SPOTTED                                  SPOTTED OR *NON-SPOTTED

        * foal coat color will depend on mare's basic pigment color


Copyright © 2002 Abmor Acres Farm
Designed and developed by
Reuben Connor.