Sire Paint Dark Brown on dam Splash White Perlino
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Paint Dark Brown and a mare Splash White Perlino. 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 Dark Brown. Genetically, it presents the base genotype E/_ A/_ 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 Dark Brown.
On the other side, the mare Splash White Perlino contributes with its genetics based on E/_ A/_ Cr/Cr Sw2/n. The gene (Sw1) acts on the base coat color and imparts well-defined white markings, mainly on the face and limbs. Many individuals inherit blue eyes. This coat is based on Perlino.
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 Dark Brown. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/e A/a To/n, E/e A/a To/To, E/e A/A To/n, E/e A/A To/To, E/E A/a To/n, E/E A/a To/To, E/E A/A To/n, E/E A/A To/To.
As for the dam, being Splash White Perlino, may present in its DNA the alleles: E/E A/A Cr/Cr Sw2/n, E/E A/A Cr/Cr Sw2/Sw2, E/E A/a Cr/Cr Sw2/n, E/E A/a Cr/Cr Sw2/Sw2, E/e A/A Cr/Cr Sw2/n, E/e A/A Cr/Cr Sw2/Sw2, E/e A/a Cr/Cr Sw2/n, E/e A/a Cr/Cr Sw2/Sw2.
Understanding the Alleles
To understand the result of this crossing, note the gene sets at play:
- 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).
- 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.
- Sw2/ (Splash White): Manchas brancas que sobem das partes inferiores do cavalo, frequentemente associadas a olhos azuis.
Calculated Probabilities
Being the sire Paint Dark Brown with genotype (E/e A/a To/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 Tobiano allele (To).
Being the sire Paint Dark Brown with genotype (E/e A/a To/To), 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 always transmits the Tobiano allele (To).
Being the sire Paint Dark Brown with genotype (E/e A/A To/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 Tobiano allele (To).
Being the sire Paint Dark Brown with genotype (E/e A/A To/To), 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 always transmits the Tobiano allele (To).
Being the dam Splash White Perlino with genotype (E/E A/A Cr/Cr Sw2/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 always transmits the Cream dilution allele (Cr) and tem 50% de chance de transmitir o alelo Splash White (Sw2).
Being the dam Splash White Perlino with genotype (E/E A/A Cr/Cr Sw2/Sw2), 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 always transmits the Cream dilution allele (Cr) and sempre transmite o alelo Splash White (Sw2).
Being the dam Splash White Perlino with genotype (E/E A/a Cr/Cr Sw2/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 always transmits the Cream dilution allele (Cr) and tem 50% de chance de transmitir o alelo Splash White (Sw2).
Being the dam Splash White Perlino with genotype (E/E A/a Cr/Cr Sw2/Sw2), 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 always transmits the Cream dilution allele (Cr) and sempre transmite o alelo Splash White (Sw2).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Paint Splash White BuckskinOpen Coat ➜ 19,6%
Paint BuckskinOpen Coat ➜ 19,6%
Splash White BuckskinOpen Coat ➜ 19,6%
BuckskinOpen Coat ➜ 19,6%
Paint Splash White PalominoOpen Coat ➜ 3,3%
Paint PalominoOpen Coat ➜ 3,3%
Splash White PalominoOpen Coat ➜ 3,3%
PalominoOpen Coat ➜ 3,3%
Paint Splash White Smoky BlackOpen Coat ➜ 2,1%
Paint Smoky BlackOpen Coat ➜ 2,1%
Splash White Smoky BlackOpen Coat ➜ 2,1%
Smoky BlackOpen Coat ➜ 2,1%
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