Sire Dun Chestnut on dam Splash White Buckskin
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Dun Chestnut and a mare Splash White 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 Dun Chestnut. Genetically, it presents the base genotype e/e 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 Chestnut.
On the other side, the mare Splash White Buckskin contributes with its genetics based on E/_ A/_ Cr/n 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 Buckskin.
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 Dun Chestnut. it carries specific gene combinations. The possible genotypes for the sire include variants such as: e/e A/A D/n, e/e A/A D/D, e/e A/a D/n, e/e A/a D/D, e/e a/a D/n, e/e a/a D/D.
As for the dam, being Splash White Buckskin, may present in its DNA the alleles: E/E A/A Cr/n Sw2/n, E/E A/A Cr/n Sw2/Sw2, E/E A/a Cr/n Sw2/n, E/E A/a Cr/n Sw2/Sw2, E/e A/A Cr/n Sw2/n, E/e A/A Cr/n Sw2/Sw2, E/e A/a Cr/n Sw2/n, E/e A/a Cr/n Sw2/Sw2.
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 Dun Chestnut with genotype (e/e A/A 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 primitive Dun allele (D).
Being the sire Dun Chestnut with genotype (e/e A/A 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 always transmits the primitive Dun allele (D).
Being the sire Dun Chestnut with genotype (e/e A/a 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 primitive Dun allele (D).
Being the sire Dun Chestnut with genotype (e/e A/a 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 always transmits the primitive Dun allele (D).
Being the dam Splash White Buckskin with genotype (E/E A/A Cr/n 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 has a 50% chance of transmitting the Cream dilution allele (Cr) and tem 50% de chance de transmitir o alelo Splash White (Sw2).
Being the dam Splash White Buckskin with genotype (E/E A/A Cr/n 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 has a 50% chance of transmitting the Cream dilution allele (Cr) and sempre transmite o alelo Splash White (Sw2).
Being the dam Splash White Buckskin with genotype (E/E A/a Cr/n 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 has a 50% chance of transmitting the Cream dilution allele (Cr) and tem 50% de chance de transmitir o alelo Splash White (Sw2).
Being the dam Splash White Buckskin with genotype (E/E A/a Cr/n 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 has a 50% chance of transmitting 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 Dun BuckskinOpen Coat ➜ 6,9%
Dun BuckskinOpen Coat ➜ 6,9%
Splash White BuckskinOpen Coat ➜ 6,9%
BuckskinOpen Coat ➜ 6,9%
Splash White Dun BayOpen Coat ➜ 6,2%
Dun BayOpen Coat ➜ 6,2%
Splash White BayOpen Coat ➜ 6,2%
BayOpen Coat ➜ 6,2%
Splash White Dun PalominoOpen Coat ➜ 4,7%
Dun PalominoOpen Coat ➜ 4,7%
Splash White PalominoOpen Coat ➜ 4,7%
PalominoOpen Coat ➜ 4,7%
Splash White Dun ChestnutOpen Coat ➜ 4,7%
Dun ChestnutOpen Coat ➜ 4,7%
Splash White ChestnutOpen Coat ➜ 4,7%
ChestnutOpen Coat ➜ 4,7%
Splash White Dun Smoky BlackOpen Coat ➜ 0,9%
Dun Smoky BlackOpen Coat ➜ 0,9%
Splash White Smoky BlackOpen Coat ➜ 0,9%
Smoky BlackOpen Coat ➜ 0,9%
Splash White Dun BlackOpen Coat ➜ 0,9%
GrulloOpen Coat ➜ 0,9%
Splash White BlackOpen Coat ➜ 0,9%
BlackOpen Coat ➜ 0,9%
Splash White Dun Dark BrownOpen Coat ➜ 0,7%
Dun Dark BrownOpen Coat ➜ 0,7%
Splash White Dark BrownOpen Coat ➜ 0,7%
Dark BrownOpen Coat ➜ 0,7%
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