Sire Buckskin on dam Gray Cremello
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Buckskin and a mare Gray Cremello. 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 Buckskin. Genetically, it presents the base genotype E/_ A/_ Cr/n. Golden cream coat with black mane, tail and legs, resulting from a single cream gene dilution over the bay base.
On the other side, the mare Gray Cremello contributes with its genetics based on e/e 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 Cremello.
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 Buckskin. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/E A/A Cr/n, E/E A/a Cr/n, E/e A/A Cr/n, E/e A/a Cr/n.
As for the dam, being Gray Cremello, may present in its DNA the alleles: 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, e/e a/a Cr/Cr G/n, e/e a/a Cr/Cr G/G.
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).
- G/ (Grey - Tordilho): Causes progressive greying. It is epistatic (covers other colors).
Calculated Probabilities
Being the sire Buckskin with genotype (E/E A/A Cr/n), it transmits the (E) allele to 100% of offspring, enabling black pigment production (eumelanin) 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).
Being the sire Buckskin with genotype (E/E A/a Cr/n), it transmits the (E) allele to 100% of offspring, enabling black pigment production (eumelanin) 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).
Being the sire Buckskin with genotype (E/e A/A Cr/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, restricting black pigment to the extremities and has a 50% chance of transmitting the Cream dilution allele (Cr).
Being the sire Buckskin with genotype (E/e A/a Cr/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 (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).
Being the dam Gray Cremello with genotype (e/e A/A Cr/Cr G/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 always transmits the Cream dilution allele (Cr) and has a 50% chance of transmitting the Grey allele (G).
Being the dam Gray Cremello with genotype (e/e A/A Cr/Cr G/G), 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 always transmits the Cream dilution allele (Cr) and always transmits the Grey allele (G).
Being the dam Gray Cremello with genotype (e/e A/a Cr/Cr G/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 always transmits the Cream dilution allele (Cr) and has a 50% chance of transmitting the Grey allele (G).
Being the dam Gray Cremello with genotype (e/e A/a Cr/Cr G/G), 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 always transmits the Cream dilution allele (Cr) and always transmits the Grey allele (G).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Gray PerlinoOpen Coat ➜ 13,8%
PerlinoOpen Coat ➜ 13,8%
Gray BuckskinOpen Coat ➜ 13,8%
BuckskinOpen Coat ➜ 13,8%
Gray CremelloOpen Coat ➜ 9,4%
CremelloOpen Coat ➜ 9,4%
Gray PalominoOpen Coat ➜ 9,4%
PalominoOpen Coat ➜ 9,4%
Gray Smoky CreamOpen Coat ➜ 1,9%
Smoky CreamOpen Coat ➜ 1,9%
Gray Smoky BlackOpen Coat ➜ 1,9%
Smoky BlackOpen Coat ➜ 1,9%
Want absolute precision?
Genetics is detailed. Knowing whether the animal is Homozygous or Heterozygous completely changes the result. You can run 100% precise simulations by filtering according to the exact genotype of your animal in our App.
Open Rancholi Simulator