Sire Splash White Black on dam Dun Palomino
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Splash White Black and a mare Dun 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 Splash White Black. Genetically, it presents the base genotype E/_ a/a 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 Black.
On the other side, the mare Dun Palomino contributes with its genetics based on e/e Cr/n D/n. The Dun gene acts on the base color, adding the characteristic dark dorsal stripe. In some cases it lightens the body tone and may also produce zebra-like leg markings. 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 Splash White Black. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/e a/a Sw2/n, E/e a/a Sw2/Sw2, E/E a/a Sw2/n, E/E a/a Sw2/Sw2.
As for the dam, being Dun Palomino, may present in its DNA the alleles: e/e A/A Cr/n D/n, e/e A/A Cr/n D/D, e/e A/a Cr/n D/n, e/e A/a Cr/n D/D, e/e a/a Cr/n D/n, e/e a/a Cr/n D/D.
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).
- D/ (Dun - Primitive Gene): Dilutes body color and adds dorsal stripe and leg barring.
- Sw2/ (Splash White): Manchas brancas que sobem das partes inferiores do cavalo, frequentemente associadas a olhos azuis.
Calculated Probabilities
Being the sire Splash White Black with genotype (E/e a/a Sw2/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 tem 50% de chance de transmitir o alelo Splash White (Sw2).
Being the sire Splash White Black with genotype (E/e a/a Sw2/Sw2), 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 sempre transmite o alelo Splash White (Sw2).
Being the sire Splash White Black with genotype (E/E a/a 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, allowing black to spread in homozygosis (if Extension is present) and tem 50% de chance de transmitir o alelo Splash White (Sw2).
Being the sire Splash White Black with genotype (E/E a/a 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, allowing black to spread in homozygosis (if Extension is present) and sempre transmite o alelo Splash White (Sw2).
Being the dam Dun Palomino with genotype (e/e A/A Cr/n D/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 primitive Dun allele (D).
Being the dam Dun Palomino with genotype (e/e A/A Cr/n D/D), 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 primitive Dun allele (D).
Being the dam Dun Palomino with genotype (e/e A/a Cr/n D/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 primitive Dun allele (D).
Being the dam Dun Palomino with genotype (e/e A/a Cr/n D/D), 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 primitive Dun allele (D).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Splash White Dun BuckskinOpen Coat ➜ 4,9%
Dun BuckskinOpen Coat ➜ 4,9%
Splash White BuckskinOpen Coat ➜ 4,9%
BuckskinOpen Coat ➜ 4,9%
Splash White Dun BayOpen Coat ➜ 4,4%
Dun BayOpen Coat ➜ 4,4%
Splash White BayOpen Coat ➜ 4,4%
BayOpen Coat ➜ 4,4%
Splash White Dun PalominoOpen Coat ➜ 4,4%
Dun PalominoOpen Coat ➜ 4,4%
Splash White PalominoOpen Coat ➜ 4,4%
PalominoOpen Coat ➜ 4,4%
Splash White Dun ChestnutOpen Coat ➜ 4,4%
Dun ChestnutOpen Coat ➜ 4,4%
Splash White ChestnutOpen Coat ➜ 4,4%
ChestnutOpen Coat ➜ 4,4%
Splash White Dun Smoky BlackOpen Coat ➜ 3,3%
Dun Smoky BlackOpen Coat ➜ 3,3%
Splash White Smoky BlackOpen Coat ➜ 3,3%
Smoky BlackOpen Coat ➜ 3,3%
Splash White Dun BlackOpen Coat ➜ 3,3%
GrulloOpen Coat ➜ 3,3%
Splash White BlackOpen Coat ➜ 3,3%
BlackOpen Coat ➜ 3,3%
Splash White Dun Dark BrownOpen Coat ➜ 0,5%
Dun Dark BrownOpen Coat ➜ 0,5%
Splash White Dark BrownOpen Coat ➜ 0,5%
Dark BrownOpen Coat ➜ 0,5%
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