Sire 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 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 Dark Brown. Genetically, it presents the base genotype E/_ A/_. Dark brown coat, often nearly black, with black points, expressed over the bay base.
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 Dark Brown. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/e A/a, E/e A/A, E/E A/a, E/E A/A.
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).
- Sw2/ (Splash White): Manchas brancas que sobem das partes inferiores do cavalo, frequentemente associadas a olhos azuis.
Calculated Probabilities
Being the sire Dark Brown with genotype (E/e A/a), 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%.
Being the sire Dark Brown with genotype (E/e A/A), 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.
Being the sire Dark Brown with genotype (E/E A/a), 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%.
Being the sire Dark Brown with genotype (E/E A/A), 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.
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:
Splash White BuckskinOpen Coat ➜ 39,2%
BuckskinOpen Coat ➜ 39,2%
Splash White PalominoOpen Coat ➜ 6,6%
PalominoOpen Coat ➜ 6,6%
Splash White Smoky BlackOpen Coat ➜ 4,2%
Smoky BlackOpen Coat ➜ 4,2%
Want absolute precision?
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