The Neapolitan Mastiff, a breed known for its imposing size and distinctive appearance, exhibits a variety of coat colors influenced by genetic factors(1)

• Understanding the genetics behind these coat colors can provide insights into the breed's diversity and help breeders make informed decisions.

Genetic Basis of Coat Colors

The coat color of the Neapolitan Mastiff is determined by multiple genes that interact to produce the range of colors seen in the breed(2).

The primary genes involved are:

• Melanin Genes: These genes control the production of melanin, the pigment responsible for color in the coat(2).
• There are two types of melanin: eumelanin (black or brown pigment) and phaeomelanin (red or yellow pigment(2).

Dilution Gene: This gene affects the intensity of the coat color by diluting the melanin, resulting in lighter shades(3).

For example, a dilution gene can turn a black coat into a gray or blue color(4).

Modifier Genes: These genes influence the distribution and pattern of the coat color, leading to variations such as brindle, fawn, and solid colors(1)(2).

Common Coat Colors

The Neapolitan Mastiff typically exhibits the following coat colors:

• Steel Gray: A result of the dilution gene acting on black pigment(1)
• Black: The presence of eumelanin without dilution(1)
• Brown: A variation of black pigment influenced by modifier genes(1)
• Brindle: A pattern created by the interaction of multiple genes, resulting in stripes or streaks of color(1)
• Fawn: A lighter color produced by the combination of phaeomelanin and dilution genes(1)

Genetic Testing and Breeding

Genetic testing can help breeders identify the presence of specific genes responsible for coat colors(1)

By understanding the genetic makeup of their dogs, breeders can make informed decisions to preserve or enhance desired coat colors while avoiding genetic health issues.

Conclusion

The coat colors of the Neapolitan Mastiff are a result of complex genetic interactions. By studying these genetic factors, breeders can better understand the breed's diversity and make informed breeding choices to maintain and improve the breed's coat color traits.

1. www.kokogenetics.com
2. caninechronicle.com
3. vgl.ucdavis.edu
4. spiritdogtraining.com