Presentation on theme: "24 Aug 2006 Understanding Caramels Deb Armishaw & the Dilute Modifier effect."— Presentation transcript:
24 Aug 2006 Understanding Caramels Deb Armishaw & the Dilute Modifier effect
24 Aug 2006 Black versus Red pigment in cats comes in two basic forms. Eumelanin is the dark pigment it produces black, brown (i.e. chocolate/cinnamon) colour Phaeomelanin is the bright pigment it produces red colour
24 Aug 2006 Dilute Modified Colours Blue Caramel = break away single + clumped round shaped Eumelanin granules Lilac (Lavender) Caramel = break away single + clumped oval shaped Eumelanin granules Fawn Caramel = break away single + clumped spindle shaped Eumelanin granules Apricot (Cream Caramel) = break away single + clumped Phaeomelanin granules
24 Aug 2006 3 Lavender Caramel Oriental Kittens with a Lavender & Blue
24 Aug 2006 Effect colour granules are clumped single grains break off muddies the light in the hair shaft causes the blue, lilac, fawn and cream to modify appears to have a browning effect Coat can have metallic sheen
24 Aug 2006 Caramel is the modification of a colour. Like tabby or silver it does not and can not stand alone. It has to have a colour to exist. It is impossible for a caramel to appear in a litter of two blue, two lilac, two fawn or two cream parents. The Dm gene has no apparent effect on dense coat colours (Turner, 1992; Vella et al, 1999).
24 Aug 2006 DenseDilute ModifierDilute Black Chocolate Blue Caramel Blue Lavender Caramel Lilac/Lavender Cinnamon Red Fawn Caramel Fawn Apricot Cream
24 Aug 2006 There are four base colours Cream or Apricot
24 Aug 2006 Visual Chart of Dm Colours GeneDBB1O Dense BlackChocolateCinnamonRed Dilute Modifier Blue Caramel Lilac/Lavender Caramel Fawn Caramel Apricot Dilute BlueLilac/LavenderFawnCream These colours are not exact and are only to show where the Dm gene fits into the colour range.
24 Aug 2006 References P Turner (1992) The Birth of Caramels. Courtesy: D Turner, NSWCFA CM Vella, LM Shelton, JJ McGonagle and TW Stranglen (1999) Colour Inheritance in Robinson’s Genetics for cat breeders and veterinarians. 4th edition, Butterworth Heinemann; Oxford, UK D Brown (1992) Feline Colour Genetics Dearinger Enterprises; Utah, USA