Sire Gray Smoky Cream on dam Paint Palomino
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Gray Smoky Cream and a mare Paint Palomino. Equine genetics is a universe of combinations where dominant and recessive alleles determine the final coat of each individual.
On one side, we have the stallion Gray Smoky Cream. Genetically, it presents the base genotype E/_ a/a Cr/Cr G/n. The (G) gene acts on the base coat promoting progressive lightening throughout the horse's life until reaching very pale or completely white tones. This coat is based on Smoky Cream.
On the other side, the mare Paint Palomino contributes with its genetics based on e/e Cr/n To/n. The (To) gene acts on the base coat forming large, well-defined white patches across the body and legs. Many cases also inherit blue eyes. This coat is based on Palomino.
Quando combinamos esses códigos genéticos, criamos uma matriz de probabilidades. É importante lembrar que o resultado visual (fenótipo) muitas vezes esconde genes recessivos que podem pular uma geração.
The Genotypes Involved
For a horse to have the coat Gray Smoky Cream. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/e a/a Cr/Cr G/n, E/e a/a Cr/Cr G/G, E/E a/a Cr/Cr G/n, E/E a/a Cr/Cr G/G.
As for the dam, being Paint Palomino, may present in its DNA the alleles: e/e A/A Cr/n To/n, e/e A/A Cr/n To/To, e/e A/a Cr/n To/n, e/e A/a Cr/n To/To, e/e a/a Cr/n To/n, e/e a/a Cr/n To/To.
Understanding the Alleles
To understand the result of this crossing, note the gene sets at play:
- e/e (Red Factor - Homozygous Recessive): Determines the inability to produce black pigment, resulting in an exclusively red base coat (Chestnut).
- E/ (Extension - Dominant): The Extension gene controls eumelanin (black) production. At least one E allele allows the horse to have black hairs.
- A/ (Agouti - Dominant): The Agouti gene controls black distribution. The A allele restricts black pigment to the points (mane, tail, legs).
- a/a (Non-Agouti - Recessive): Allows black pigment to spread uniformly across the body. Essential for Solid Black (if E/).
- Cr/n (Heterozygous Cream): One copy of the dilution allele. Lightens red pigment to gold (e.g. Palomino, Buckskin).
- Cr/Cr (Double Cream): Maximum dilution. Pink skin, blue eyes (e.g. Cremello, Perlino).
- To/ (Tobiano): Dominant gene for vertical white patches crossing the back.
- G/ (Grey - Tordilho): Causes progressive greying. It is epistatic (covers other colors).
Calculated Probabilities
Being the sire Gray Smoky Cream with genotype (E/e a/a Cr/Cr G/n), it transmits the (E) allele (black factor) to 50% and the (e) allele (red factor) to the other 50% and transmits the (a) allele to 100% of offspring, allowing black to spread in homozygosis (if Extension is present) and always transmits the Cream dilution allele (Cr) and has a 50% chance of transmitting the Grey allele (G).
Being the sire Gray Smoky Cream with genotype (E/e a/a Cr/Cr G/G), it transmits the (E) allele (black factor) to 50% and the (e) allele (red factor) to the other 50% and transmits the (a) allele to 100% of offspring, allowing black to spread in homozygosis (if Extension is present) and always transmits the Cream dilution allele (Cr) and always transmits the Grey allele (G).
Being the sire Gray Smoky Cream with genotype (E/E a/a Cr/Cr G/n), it transmits the (E) allele to 100% of offspring, enabling black pigment production (eumelanin) and transmits the (a) allele to 100% of offspring, allowing black to spread in homozygosis (if Extension is present) and always transmits the Cream dilution allele (Cr) and has a 50% chance of transmitting the Grey allele (G).
Being the sire Gray Smoky Cream with genotype (E/E a/a Cr/Cr G/G), it transmits the (E) allele to 100% of offspring, enabling black pigment production (eumelanin) and transmits the (a) allele to 100% of offspring, allowing black to spread in homozygosis (if Extension is present) and always transmits the Cream dilution allele (Cr) and always transmits the Grey allele (G).
Being the dam Paint Palomino with genotype (e/e A/A Cr/n To/n), it transmits the (e) allele to 100% of offspring, allowing only red pigment expression (phaeomelanin) and transmits the (A) allele to 100% of offspring, restricting black pigment to the extremities and has a 50% chance of transmitting the Cream dilution allele (Cr) and has a 50% chance of transmitting the Tobiano allele (To).
Being the dam Paint Palomino with genotype (e/e A/A Cr/n To/To), it transmits the (e) allele to 100% of offspring, allowing only red pigment expression (phaeomelanin) and transmits the (A) allele to 100% of offspring, restricting black pigment to the extremities and has a 50% chance of transmitting the Cream dilution allele (Cr) and always transmits the Tobiano allele (To).
Being the dam Paint Palomino with genotype (e/e A/a Cr/n To/n), it transmits the (e) allele to 100% of offspring, allowing only red pigment expression (phaeomelanin) and transmits the (A) allele (restriction) to 50% and the (a) allele (no restriction) to the other 50% and has a 50% chance of transmitting the Cream dilution allele (Cr) and has a 50% chance of transmitting the Tobiano allele (To).
Being the dam Paint Palomino with genotype (e/e A/a Cr/n To/To), it transmits the (e) allele to 100% of offspring, allowing only red pigment expression (phaeomelanin) and transmits the (A) allele (restriction) to 50% and the (a) allele (no restriction) to the other 50% and has a 50% chance of transmitting the Cream dilution allele (Cr) and always transmits the Tobiano allele (To).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Paint Gray PerlinoOpen Coat ➜ 4,9%
Paint PerlinoOpen Coat ➜ 4,9%
Gray PerlinoOpen Coat ➜ 4,9%
PerlinoOpen Coat ➜ 4,9%
Paint Gray BuckskinOpen Coat ➜ 4,9%
Paint BuckskinOpen Coat ➜ 4,9%
Gray BuckskinOpen Coat ➜ 4,9%
BuckskinOpen Coat ➜ 4,9%
Paint Gray CremelloOpen Coat ➜ 4,4%
Paint CremelloOpen Coat ➜ 4,4%
Gray CremelloOpen Coat ➜ 4,4%
CremelloOpen Coat ➜ 4,4%
Paint Gray PalominoOpen Coat ➜ 4,4%
Paint PalominoOpen Coat ➜ 4,4%
Gray PalominoOpen Coat ➜ 4,4%
PalominoOpen Coat ➜ 4,4%
Paint Gray Smoky CreamOpen Coat ➜ 3,3%
Paint Smoky CreamOpen Coat ➜ 3,3%
Gray Smoky CreamOpen Coat ➜ 3,3%
Smoky CreamOpen Coat ➜ 3,3%
Paint Gray Smoky BlackOpen Coat ➜ 3,3%
Paint Smoky BlackOpen Coat ➜ 3,3%
Gray Smoky BlackOpen Coat ➜ 3,3%
Smoky BlackOpen Coat ➜ 3,3%
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