The Du locus determines whether a rabbit has dutch pattern, which are generally similar but more pronounced than vienna markings. Unlike vienna, it does not naturally cause a completely white rabbit.
Rabbits with the Dutch gene will have distinctive white markings, which can be made clean and more consistent with selective breeding.
It is not desired for showing in the US, but Dutch is capable of causing blue eyes or partially blue eyes (sometimes even heterochromia in which one eye may be blue or have a blue section of the iris). This does not necessarily mean that a rabbit is Vienna (a gene commonly associated with Blue Eyes) and can come from the Dutch gene (determined by hidden modifiers).
- Although they ,ay have a similar pattern, Dutch and Vienna are different genes. It is possible for a rabbit to have both at the same time, but one major difference is that Vienna will cause a rabbit to be completely white with blue eyes when two copies are present. This is not the case with Dutch. Breeds such as Dutch, Dwarf Hotots, and Blanc de Hotots have Dutch genetics, but not Vienna (otherwise they would frequently throw BEW offspring).
Dutch Pattern Colors
No Dutch (dudu)
Most colors lack the Dutch gene. These are normal colored rabbits. Dutch genetics are sometimes excluded from genotypes, particularly when it's assumed that the rabbit is DuDu (not Dutch) such as in breeds that don't have the gene, although not always. It's good to ask for clarification on a rabbit just to be sure.
Non Dutch Colors