ACF Cat Yearbook 2006
Total Page:16
File Type:pdf, Size:1020Kb
Caramel tortie Burmese. Australian Mist - the first of her breed identified as Above: If his sire (deceased) caramel. carried cinnamon, the caramel above (shown with his true lilac friend) could Russian Tabby be fawn based. Otherwise Point registered as he must be lilac based. caramel and at South Africa - right, his son, third generation of showing definite lilac based caramel brown tinge to his self. Mum and “lilac” paws. grandma, both the same colour. Above: Lilac based caramels Below: Blue based caramels One of many Fancypawz (NZ) blue based silver Brother tabby point Birman, and sister, this one resident Slovakia in South Africa. DGC Zarzuela Alinghi (UK) bred in NZ (base colour uncertain as NZ does not Australian Mist 5 mth male from parents define base colour in Dm). registered as blue. 56 Dilute modifier in Scandinavia by Dagny Dickens, owner of Siamese since 1957, breeder of Siamese [Novarita] since 1975, Allbreed Judge (FIFe educated) Dilute modifier is something really controversial. Dilute modifier is the temporary name of a gene that is believed or said to influence the look of the colour of cats with double genes for dilution. Some of these colours have been given their own names: caramel and apricot. And the question is: does it exist or does it not exist? I can not answer that question with a ‘Yes’ or a ‘No’, but I might get the reader to open his eyes to the fact that there are colour phenomena, (I will call them so for the time being), that should not easily be rejected and snorted at. In an article like this one, history must of course be a part, just as are standards of points – abbreviated SOP – ought to be – and geography: Where in the world does one find dilute modifier colours? Where are they recognized? A big dose of genetics is a must, you can not escape that. To some extent I have used the EMS codes to indicate breed/colour/coat length for the cats. Immediately a problem arises: for certain cats there is no reliable information if they are/were blue based dilute modifier (am) or lilac based dilute modifier (cm). These cats are indicated with am (a = blue and m = modified), cm if the EMS codes have been used. In the early stages it is not likely that the cats would have been fawn based dilute modifier (pm), but if genetically possible, the code would be am, cm, pm. The same goes for the tortoiseshell varieties. When doubted the code would be gm, jm or possibly gm, jm, rm. What this article covers of history, the spreading, recognition and SOP, covers almost solely siamese (SIA) and oriental shorthair (OSH). It is within these breeds that most cats with dilute modifier colours have been found, whether the cats have been registered with such colours or not. When it comes to registration numbers and titles for particular cats, such information has not always been included. Dilute modifier and heredity According to the current (April 2006) most prevalent theory, dilute modifier is a single gene of its own. As the name implies, it affects the colour (pigment granules) in the hairs of cats that are diluted, that is cats that have double set of the recessive gene for dilution. It has no hitherto seen influence on the colour of cats that are not diluted, the colours n (black/seal), b (chocolate), d (red), f (black/seal tortie), h (chocolate tortie), o (cinnamon) and q (cinnamon tortie). The colours can be listed as follows: EMS code/Without dilute modifier EMS code/With dilute modifier a Blue am Caramel, blue based c Lilac cm Caramel , lilac based e Cream em Apricot g Blue tortie (tortoiseshell) gm Caramel tortie, blue based j Lilac tortie (tortoiseshell) jm Caramel tortie, lilac based p Fawn pm Caramel , fawn based r Fawn tortie (tortoiseshell) rm Caramel tortie, fawn based The gene is genetically abbreviated Dm. Through the upper case letter D it is indicated that the gene is dominant, which implies that it is enough if only one of the parents has the gene. It need not come from both parents. The opposite gene is given as dm and could be called non-dilute modifier. The beginning with lower case letter shows that the gene is recessive, that it must come from both parents and that two cats that do not have the dilute modifier gene, can not have progeny with dilute modifier colour when mated. When the genetics do not correspond When studying pedigrees for dilute modifier cats, sooner or later one runs across genetic impossibilities. Two cats with dilution dependent colour – but without dilute modifier – for example cream [e] mated with blue [a] should not be able to have kittens with dilute modifier colours. Nevertheless this is what is found and such impossibilities are often brought forward as arguments against dilute modifier. The most simple explanation – and one should not cause trouble unnecessarily, one could willingly compare with Occam’s Razor*1) – is that one or both parents are registered in the wrong colour or that the kitten does not have a dilute modifier colour. The person that eventually, in Scandinavia, tries to decide if a cat has a dilute modifier colour, encounters a very special problem: the light in our show halls. And how bad that is, you all know. To be able to assess coat colour and eye colour, daylight is needed and it is too risky to take the cat and go outdoors. In addition the twilight comes early from September to beginning of April. Indoors the light conditions are miserable, green floors that give colour casting, mixed blue and yellow light from fluorescent tubes, orange walls. The only halls that will do, are those with big glass windows facing north, so that direct sunlight is possible. There are not many of them, but there is one such hall worthy of five stars: the A-hall for betting on horses (aka Totohallen) at the Solvalla trotting course in western Stockholm. It is situated at the winning post and has a four-storeyed glass wall facing north. Even in wintertime there is enough and good light for colour assesment, at least from 10 am to 2 pm. 57 Oriental Shorthair and dilute modifier The first cats with different colours, later classed as dilute modifier dependent, were bred by Pat Turner [Scintilla] in England, at the beginning of 1970-ties. Behind these cats was a chinchilla persian and siamese of different colours, among others, red point. Well known descendants from this line were Scintilla Serene Sunset, tortoiseshell silver shaded female, Scintilla Koffee Kreme, caramel point female and Scintilla Muted Mink, caramel silver spotted female. Mostly these cats were used in OSH breeding programmes. Three cats from these lines are known as exports to Scandinavia, the full brother and sister Scintilla Anticipation, OSH bs 24 ɉ (to Sweden) and Scintilla Fascination, OSH hs 11 Ɋ (to Norway), along with the closely related Scintilla Firstinfinland, OSH f Ɋ (to Finland). Other lines stayed in the English OSH breeding programmes of that time. One more specially known of these was GC Folklore Moonwolf, OSH n 24 ɉ, dob 7/10-79, whose great great grand dam was Scintilla Serene Sunset. More cats and lines are probably to be found, but to include them here, would turn the article into “Introduction in genealogical research on Oriental Shorthair”. Siamese and dilute modifier Since OSH cats not freely have been allowed to be bred into the SIA breed*2), how come that the Siamese stock so to say is “swarming” with dilute modifier cats? Here is what Hetty Berntrop [Taothai], now in Australia, but earlier active in Holland, writes in her article about caramel and apricot: “From an unsuspected side caramel slipped in as well. When the first tabby point Siamese appeared they were seal tabby or chocolate tabby point. However, most tabby points come from a mating of Macji Dom Dija, a seal point Siamese x a Silver tabby moggie. Their daughter Tiggi, mated to Chancasta, a seal point Siamese gave birth in 1960 to Miss Tee Kat, the well-known seal tabby point that can be found at the back of almost all Siamese tabby point pedigrees. The silver tabby moggie was found in the same street where a Chinchilla breeder lived. And in the old days cats were not locked up in cat runs and catteries all the time but often could roam free in the village. So it really was no wonder that caramel popped up in Siamese tabby point lines too, although it took some time for most breeders to realise they had a different colour.” That is quite so, but all Siamese imports to Scandinavia have not been tabby points? How does that tally? Now it will be about genealogical research and that on Siamese. What the Siamese genealogical research led to As I was one of the earliest breeders of tabby pointed Siamese in Sweden, as I so to say have “pedigrees in my blood” – I certainly wanted to know what was behind my own lines. My first tabby pointed cat IC San-T-Ree Tiger Favorita, SIA n 21, had a mother that Eiwor Andersson had imported from England. This cat, Shybu Vanya, SIA n 21, had two different lines of tabby point Siamese in her background through her grand dam Greenleaf Tama Fuyo, tabby pointed, but for whom I have not yet found any reasonably certain information of what colour tabby point she was. In springtime 2005 I really set the whole thing going, most inspired and a little forced by Hetty Berntrop’s article about dilute modifier that Rina Matthiessen [Parlörs EUR, BRI, DRX] had translated to Swedish 2004, but which at that time was not considered to be interesting by Orientexpressen, club magazine for the Swedish breed club Siames- and Orientalgruppen.