Sire Paint Buckskin on dam Dun Dark Brown
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Paint Buckskin and a mare Dun Dark Brown. 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 Buckskin. Genetically, it presents the base genotype E/_ A/_ Cr/n 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 Buckskin.
On the other side, the mare Dun Dark Brown contributes with its genetics based on E/_ A/_ 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 Dark Brown.
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 Buckskin. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/E A/A Cr/n To/n, E/E A/A Cr/n To/To, E/E A/a Cr/n To/n, E/E A/a Cr/n To/To, E/e A/A Cr/n To/n, E/e A/A Cr/n To/To, E/e A/a Cr/n To/n, E/e A/a Cr/n To/To.
As for the dam, being Dun Dark Brown, may present in its DNA the alleles: 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, E/E A/A D/n, E/E A/A D/D.
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/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.
- To/ (Tobiano): Dominant gene for vertical white patches crossing the back.
Calculated Probabilities
Being the sire Paint Buckskin with genotype (E/E A/A Cr/n To/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 has a 50% chance of transmitting the Tobiano allele (To).
Being the sire Paint Buckskin with genotype (E/E A/A Cr/n To/To), 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 always transmits the Tobiano allele (To).
Being the sire Paint Buckskin with genotype (E/E A/a Cr/n To/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 has a 50% chance of transmitting the Tobiano allele (To).
Being the sire Paint Buckskin with genotype (E/E A/a Cr/n To/To), 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 always transmits the Tobiano allele (To).
Being the dam Dun Dark Brown with genotype (E/e A/a D/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 primitive Dun allele (D).
Being the dam Dun Dark Brown with genotype (E/e A/a D/D), 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 primitive Dun allele (D).
Being the dam Dun Dark Brown with genotype (E/e A/A D/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 primitive Dun allele (D).
Being the dam Dun Dark Brown with genotype (E/e A/A D/D), 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 primitive Dun allele (D).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Paint Dun BuckskinOpen Coat ➜ 9,8%
Dun BuckskinOpen Coat ➜ 9,8%
Paint BuckskinOpen Coat ➜ 9,8%
BuckskinOpen Coat ➜ 9,8%
Paint Dun BayOpen Coat ➜ 8,8%
Dun BayOpen Coat ➜ 8,8%
Paint BayOpen Coat ➜ 8,8%
BayOpen Coat ➜ 8,8%
Paint Dun PalominoOpen Coat ➜ 1,6%
Dun PalominoOpen Coat ➜ 1,6%
Paint PalominoOpen Coat ➜ 1,6%
PalominoOpen Coat ➜ 1,6%
Paint Dun ChestnutOpen Coat ➜ 1,6%
Dun ChestnutOpen Coat ➜ 1,6%
Paint ChestnutOpen Coat ➜ 1,6%
ChestnutOpen Coat ➜ 1,6%
Paint Dun Smoky BlackOpen Coat ➜ 1,1%
Dun Smoky BlackOpen Coat ➜ 1,1%
Paint Smoky BlackOpen Coat ➜ 1,1%
Smoky BlackOpen Coat ➜ 1,1%
Paint Dun BlackOpen Coat ➜ 1,1%
GrulloOpen Coat ➜ 1,1%
Paint BlackOpen Coat ➜ 1,1%
BlackOpen Coat ➜ 1,1%
Paint Dun Dark BrownOpen Coat ➜ 1,0%
Dun Dark BrownOpen Coat ➜ 1,0%
Paint Dark BrownOpen Coat ➜ 1,0%
Dark BrownOpen Coat ➜ 1,0%
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