Asphalt (EDNRB2-related) - Ball python

Asphalt is a ball python (Python regius) phenotype within the Yellowbelly complex. Its inheritance is incompletely dominant, meaning animals with one copy of the variant can express the trait, while animals with two copies typically show a stronger visual expression. In the hobby, a homozygous Asphalt is often referred to as Super Asphalt.

Molecular data show that Asphalt is an allele within an EDNRB2 series that also includes Yellowbelly, Spark, Specter, and Gravel. This test detects the Asphalt-associated EDNRB2 c.3118G>A variant, providing useful genetic support for phenotype interpretation.

This analysis is especially valuable when an animal is visually difficult to distinguish from similar phenotypes such as Gravel. Genetic confirmation can help clarify combinations and support more informed breeding plans.

• supports differentiation between Asphalt and visually similar animals
• helps improve interpretation of animals within the Yellowbelly complex
• provides practical information for more informed breeding choices