Traits
Traits[edit | edit source]
Overview: Traits are not genes themselves, but modifiers that adjust the expression of certain genes. In rabbits, trait modifiers influence coat color, pattern, intensity, and other phenotypic characteristics. Understanding these modifiers can simplify selective breeding and predict outcomes in offspring.
Common Trait Modifiers[edit | edit source]
Intensity Marker[edit | edit source]
The intensity marker is typically seen in rabbits with a non-extension coat pattern (e.g., "red"). The intensity is usually noted as:
- + : Palomino / creamy yellow
- ++ : Light red
- +++ : Medium red
- ++++ : Dark mahogany red
This modifier affects the depth of color expression without changing the underlying genetic locus.
Broken Gene Extent (En – Broken)[edit | edit source]
The broken gene affects the amount and distribution of white on the rabbit's coat. Expression can range from minimal to nearly complete:
- **Booted Broken:** Over 90% color, minimal white
- **Blanket Broken:** 10–50% color with large white areas
- **False Charlie:** Less than 10% color, rabbit appears almost entirely white
Modifiers can sometimes make genetically spotted rabbits appear solid due to extreme blanket patterns.
Genetic Testing for Traits[edit | edit source]
With the rabbit genome mapped ([NCBI GenBank: Oryctolagus cuniculus Thorbecke inbred](https://www.ncbi.nlm.nih.gov/nuccore/256946799)), breeders can begin to explore genetic tests for:
- White spot carriers (Dutch, Vienna, English Spot)
- Coat pattern predictions (e.g., Harlequin, En modifiers)
- Hereditary disorders and recessive genes affecting immunity
- Malocclusion carriers, moon eye, and other traits
Planned tests aim to provide breeders with definitive genetic outcomes similar to tests available for horses and dogs.
Research Resources[edit | edit source]
- [PMC Article: Trait modifiers in rabbits](https://pmc.ncbi.nlm.nih.gov/articles/PMC5421586/)
- [Rabbit genome mapping](https://www.ncbi.nlm.nih.gov/nuccore/256946799)
Note: Future work involves compiling a list of protein chains correlated with specific traits and cross-referencing them with growth, type, and environmental adaptations such as heat tolerance.
