In Germany, currently all sorts of rats, which have a somewhat spotted back, called Variegated. This is at a Variegated both the American Fancy Rat Association AFRMA (since 19. August 2006) and National Fancy Rat Society NFRS (UK) standardized drawing. Even the German standard of color rat performs a standard for Variegated drawing.
The drawing of the rat corresponds to a Variegated Hooded, only that many color patches are distributed on the back and on the sides instead of the back strip.
The AFRMA describes in her standard, that the head and shoulders as that of a hooded rat should be colored with a Head spot in the middle of the forehead, which should be round or oval and can not be larger than the eye of the rat. The color patches should cover the rest of the white body from shoulders to tail uniform, including the sides and tail. The bottom (including abdominal, Chest and throat) should be white and free of creams or patches.
In contrast to the AFRMA NFRS allowed next to the Headpsot a blaze on the forehead. A Head Spot should be placed centrally, and his or oval and not greater than the rat eye. A blaze to be wedge-shaped and symmetrically and go from the nose to the forehead. The drawing should not go beyond the cheeks or eyes. The remainder of the upper surface (move, Sides and tail) the rat body should draw white and evenly with spots of a clearly contrasting color. Again, the lower silk should be white and free of creams or patches.
The German standard of color rat1)Noack, J. & Flechsig, S. (2012). The German standard of color rat. Friedrich Born-Verlag tolerated only one blaze, if it is symmetrical. The spots of the animal should be balanced and not give the impression of a distorted stroke. From head to shoulders, the animal should be uniformly colored.
The genetics of Variegated rat
The AFRMA writes on their website completely honest, that the genetic background of Variegated is not fully understood rat today. Obviously, several alleles of the H locus and other circumstances modifier may be involved, acting in combination with each other. In addition, genetic linkage can (Linkage) play a role. More information about the genetics of Variegated rat in Article "Genetic analysis of the modifier for the Hooded phenotype in rats".
Karen Robbins published 2012 in AFRMA Council & Mouse Tales WSSF a comprehensive items with results to test breeding, it has made, to the genetic basis Variegated and Dalmation to explore closer. It was while supported by the AFRMA genetics expert Nicole Royer (Robins, 20121)). (Robins, 20122)Robins, K. (20012), Dalmatian & Variegated Rats, Test Breeding For Genetics, AFRMA Rat & Mouse Tales WSSF 2012, 11-21). Here are some of the conclusions, die Robbins & Royer drawn regarding the inheritance of Variegated:
- Variegated Variegated x does not give Hooded descendants, so it can not hh(e) his.
- Variegated Variegated x does not result in Self descendants, so it can not Hh(e) his
- Variegated Variegated x gives no English Irish Descendants, so it can not Hh(i), H(re)h(i) or h(e)h(i) his
- Variegated x Variegated kann nicht h(e)h(e) his, since then would occur in the litter just uniform badges and always Berkshire and sometimes falls Capped at Variegated Variegated x in various forms.
- Variegated always has a Head Spot (a few hairs to a large badge), This spot may also take the form of a blaze
- Dalmation & Variegated litters have always Berkshire with Head Spot descendants [or. may have]
- Variegated bad may look like Bareback, but always a Head Spot and white chin / neck / chest,
- Variegated and Hooded should never be bred, as this will cause, that the stains are not evenly distributed among the progeny Variegated, but the spots, especially along the spine are, or. that the back markers are very dirty at the Hooded descendants.
- Capped rats can be distinguished on the basis of very weak subscribed Variegated, Capped that always has a spikes of white at the end of the cap during extremely bad subscribed variegate has a Head Spot, from which no white stripe through the swatch on the head-to-back runs.
- At the conclusion of Variegated at least 2, probably 3-4 Genes involved at different loci.
- Variegated is not a simple recessive or dominant allele.
More articles, may interest you:
References [ + ]
|1.||↑||Noack, J. & Flechsig, S. (2012). The German standard of color rat. Friedrich Born-Verlag|
|2.||↑||Robins, K. (20012), Dalmatian & Variegated Rats, Test Breeding For Genetics, AFRMA Rat & Mouse Tales WSSF 2012, 11-21|