Sire Paint Cremello on dam Buckskin
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Paint Cremello and a mare Buckskin. 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 Paint Cremello. Genetically, it presents the base genotype e/e Cr/Cr 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 Cremello.
On the other side, the mare Buckskin contributes with its genetics based on E/_ A/_ Cr/n. Golden cream coat with black mane, tail and legs, resulting from a single cream gene dilution over the bay base.
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 Paint Cremello. it carries specific gene combinations. The possible genotypes for the sire include variants such as: e/e A/A Cr/Cr To/n, e/e A/A Cr/Cr To/To, e/e A/a Cr/Cr To/n, e/e A/a Cr/Cr To/To, e/e a/a Cr/Cr To/n, e/e a/a Cr/Cr To/To.
As for the dam, being Buckskin, may present in its DNA the alleles: E/E A/A Cr/n, E/E A/a Cr/n, E/e A/A Cr/n, E/e A/a Cr/n.
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.
Calculated Probabilities
Being the sire Paint Cremello with genotype (e/e A/A Cr/Cr 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 always transmits the Cream dilution allele (Cr) and has a 50% chance of transmitting the Tobiano allele (To).
Being the sire Paint Cremello with genotype (e/e A/A Cr/Cr 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 always transmits the Cream dilution allele (Cr) and always transmits the Tobiano allele (To).
Being the sire Paint Cremello with genotype (e/e A/a Cr/Cr 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 always transmits the Cream dilution allele (Cr) and has a 50% chance of transmitting the Tobiano allele (To).
Being the sire Paint Cremello with genotype (e/e A/a Cr/Cr 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 always transmits the Cream dilution allele (Cr) and always transmits the Tobiano allele (To).
Being the dam 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 dam 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 dam 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 dam 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).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Paint PerlinoOpen Coat ➜ 13,8%
PerlinoOpen Coat ➜ 13,8%
Paint BuckskinOpen Coat ➜ 13,8%
BuckskinOpen Coat ➜ 13,8%
Paint CremelloOpen Coat ➜ 9,4%
CremelloOpen Coat ➜ 9,4%
Paint PalominoOpen Coat ➜ 9,4%
PalominoOpen Coat ➜ 9,4%
Paint Smoky CreamOpen Coat ➜ 1,9%
Smoky CreamOpen Coat ➜ 1,9%
Paint Smoky BlackOpen Coat ➜ 1,9%
Smoky BlackOpen Coat ➜ 1,9%
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