Tabby cat

"Tabby" redirects here. For other uses, see Tabby (disambiguation).

Common mackerel tabby, with the classic "M" on forehead, and striped pattern.

A tabby cat is a cat with a distinctive coat that features stripes, dots, or swirling patterns. Tabbies are sometimes erroneously assumed to be a breed of cat. In fact, the tabby pattern is a naturally occurring feature that may be the original colouration of the domestic cat's distant ancestors. Tabby colour is found in many breeds of cat, as well as among the general 'moggy' (mixed-breed or mongrel) population. When cats are allowed to breed randomly, the colouration of the population tends toward brown mackerel tabbies with green eyes, leading geneticists to believe that this is the common wild phenotype of the domestic cat. The tabby usually has an "M" mark on its forehead.

The word comes from French tabis, which was earlier atabis, and in medieval Latin attabi. The initial origin of the word seems to be from the Attabiyah section of Baghdad where a type of striped silk was made that was later used to describe cats.

Tabby patterns

Descriptions

Ticked tabby pattern, as seen on these Abyssinians

There are four tabby patterns that have been shown to be genetically distinct: mackerel, classic, spotted and ticked. A fifth includes tabby as part of another basic colour pattern, the "patched" tabby, which may be a calico or tortoiseshell cat with tabby patches (the latter is called a "torbie"). A number of other variations are due to the interaction between domestic cat and wildcat genes in breeds such as the Bengal and can now be seen in the Bombay.

File:Tabby-types.jpg

Tabby pattern types

The mackerel tabby pattern has vertical, gently curving stripes on the side of the body. The stripes are narrow, and may be continuous or broken into bars and spots on the flanks and stomach. Often, an 'M' shape appears on the forehead. Mackerels also feature a 'peppered' nose, where black spots appear along the pink tip of the nose. Mackerels are also called 'fishbone tabbies'. Mackerel is the most common tabby pattern.

Classic (or 'blotched') tabbies have a similar 'M' pattern on the head, but the body markings are different, having a whirled and swirled pattern with wider stripes that make what are referred to as "butterfly" patterns on their shoulders, and usually a bullseye or oyster pattern on the flank. The legs and tail are more heavily barred and the pattern is variable with respect to the width of the bands.

The ticked tabby pattern produces hairs with distinct bands of colour on them, breaking up the tabby patterning into a salt-and-pepper appearance. Residual ghost striping or "barring" can often be seen on the lower legs, face and belly and sometimes at the tail tip.

Classic tabby, showing the bullseye pattern

The spotted tabby may not be a true pattern, but a modifier that breaks up the mackerel pattern so that the stripes appear as spots; the stripes of the classic pattern may be broken into larger spots. Both large spot and small spot patterns can be seen in the Australian Mist, Bengal, Egyptian Mau, and Ocicat breeds.

Spotted tabby pattern on an Ocicat.

All of those patterns have been observed in random bred populations. Several additional patterns are found in specific breeds. A modified classic tabby is found in the Sokoke breed. Some are due to the interaction of wild and domestic genes. Rosetted and marbled patterns are found in the Bengal breed.

The tabby is not a breed of cat, nor is it a coat colour. It's simply a coat pattern. It can show up in combination with a variety of coat colours. A cat's coat can be described as red tabby or gray tabby. Black and blue are colours that usually show up without tabby markings, but with some cats, a faint tabby pattern can actually be noticed. White is the only colour that does not have any tabby markings.

Bi-colours can have the tabby pattern show up on the coloured patches of their coat. Tortoiseshell cats sometimes display a pattern where the three-coloured tortoiseshell pattern is mixed with tabby markings. These cats are known as "torbies".

The most commonly identified kind of tabby, the Classic Tabby, tends to have a pattern of dark browns, ochres, and black. The uniform or nigh on uniform striping around the circumference of the tail indicates feral origins in that particular cat's family tree.

The Silver Tabby, as it is often known, is a distinctive white/black tabby often in a mackerel or blotched pattern. The steel-white of the fur is what gives it its name.

Genetic explanations

Main article: Cat coat genetics

In cat genetics, pattern is unrelated to colour, and so the tabby pattern may occur in any cat color, including tortoiseshell (tortoiseshell tabby cats are often called 'torbies'). White spotting of any level can also appear in combination with tabby patterns.

The tabby patterns are due to 3 distinct gene loci and one modifier:

The agouti gene, A/a, controls whether or not the tabby pattern is expressed. The dominant A reveals the underlying tabby pattern, while the recessive non-agouti or "hypermelanistic" allele, a, prevents it. Solid-colour (black or blue) cats have the aa combination, hiding the tabby pattern, although sometimes a suggestion of the underlying pattern can be seen (called "ghost striping"). However, the O gene for orange color suppresses the aa genotype, so there is no such thing as a solid orange cat.

The primary tabby pattern gene, Mc/mc, sets the basic pattern of stripes that underlies the coat. Mc is the wild-type tabby gene and produces what is called a 'mackerel striped' tabby. 'Classic' tabbies are cats who also possess mc, a recessive mutant gene that produces the blotched pattern.

The ticked pattern is on a different gene locus than the mackerel and classic tabby patterns and is epistatic to the other patterns. A dominant mutation, T^a / t^a, masks any other tabby pattern, producing a non-patterned or 'agouti' tabby with virtually no stripes or bars. If the ticked pattern gene is present, any other tabby pattern is masked. Cats homozygous for the ticked allele (T^a / T^a) have less barring than cats heterozygous for the ticked allele.