Sire Roan Perlino on dam Gray Buckskin
In this article, we will explore the genetic possibilities of coat colors for the crossing between a stallion Roan Perlino and a mare Gray 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 Roan Perlino. Genetically, it presents the base genotype E/_ A/_ Cr/Cr Rn/n. The (Rn) gene acts on the base coat by distributing white hairs throughout the body, giving it a roan appearance. The head and legs retain the original base color tones. This coat is based on Perlino.
On the other side, the mare Gray Buckskin contributes with its genetics based on E/_ A/_ Cr/n G/n. The (G) gene acts on the base coat promoting progressive lightening throughout the horse's life until reaching very pale or completely white tones. 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 Roan Perlino. it carries specific gene combinations. The possible genotypes for the sire include variants such as: E/E A/A Cr/Cr Rn/n, E/E A/A Cr/Cr Rn/Rn, E/E A/a Cr/Cr Rn/n, E/E A/a Cr/Cr Rn/Rn, E/e A/A Cr/Cr Rn/n, E/e A/A Cr/Cr Rn/Rn, E/e A/a Cr/Cr Rn/n, E/e A/a Cr/Cr Rn/Rn.
As for the dam, being Gray Buckskin, may present in its DNA the alleles: E/E A/A Cr/n G/n, E/E A/A Cr/n G/G, E/E A/a Cr/n G/n, E/E A/a Cr/n G/G, E/e A/A Cr/n G/n, E/e A/A Cr/n G/G, E/e A/a Cr/n G/n, E/e A/a Cr/n G/G.
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).
- Cr/Cr (Double Cream): Maximum dilution. Pink skin, blue eyes (e.g. Cremello, Perlino).
- G/ (Grey - Tordilho): Causes progressive greying. It is epistatic (covers other colors).
- Rn/ (Roan - Rosilho): Mixes white hairs throughout the body, keeping head and extremities in the original color.
Calculated Probabilities
Being the sire Roan Perlino with genotype (E/E A/A Cr/Cr Rn/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 has a 50% chance of transmitting the Roan allele (Rn).
Being the sire Roan Perlino with genotype (E/E A/A Cr/Cr Rn/Rn), 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 always transmits the Roan allele (Rn).
Being the sire Roan Perlino with genotype (E/E A/a Cr/Cr Rn/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 has a 50% chance of transmitting the Roan allele (Rn).
Being the sire Roan Perlino with genotype (E/E A/a Cr/Cr Rn/Rn), 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 always transmits the Roan allele (Rn).
Being the dam Gray Buckskin with genotype (E/E A/A Cr/n G/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 Grey allele (G).
Being the dam Gray Buckskin with genotype (E/E A/A Cr/n G/G), 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 Grey allele (G).
Being the dam Gray Buckskin with genotype (E/E A/a Cr/n G/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 Grey allele (G).
Being the dam Gray Buckskin with genotype (E/E A/a Cr/n G/G), 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 Grey allele (G).
Based on a standard scenario, the statistical chances for foals from this crossing are:
Gray Roan PerlinoOpen Coat ➜ 9,8%
Roan PerlinoOpen Coat ➜ 9,8%
Gray PerlinoOpen Coat ➜ 9,8%
PerlinoOpen Coat ➜ 9,8%
Gray Roan BuckskinOpen Coat ➜ 9,8%
Roan BuckskinOpen Coat ➜ 9,8%
Gray BuckskinOpen Coat ➜ 9,8%
BuckskinOpen Coat ➜ 9,8%
Gray Roan CremelloOpen Coat ➜ 1,8%
Roan CremelloOpen Coat ➜ 1,8%
Gray CremelloOpen Coat ➜ 1,8%
CremelloOpen Coat ➜ 1,8%
Gray Roan PalominoOpen Coat ➜ 1,8%
Roan PalominoOpen Coat ➜ 1,8%
Gray PalominoOpen Coat ➜ 1,8%
PalominoOpen Coat ➜ 1,8%
Gray Roan Smoky CreamOpen Coat ➜ 1,0%
Roan Smoky CreamOpen Coat ➜ 1,0%
Gray Smoky CreamOpen Coat ➜ 1,0%
Smoky CreamOpen Coat ➜ 1,0%
Gray Roan Smoky BlackOpen Coat ➜ 1,0%
Roan Smoky BlackOpen Coat ➜ 1,0%
Gray Smoky BlackOpen Coat ➜ 1,0%
Smoky BlackOpen Coat ➜ 1,0%
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