![]() Unknown cats had solid, non-agouti colours, thus Tabby patterns could not be distinguished. Unknown patterns are presented as open symbols. Circles represent females, squares represent males, filled symbols indicate phenotypically Tabby Abyssinian cats, symbols with a center dot are Tabby blotched patterned cats and striped symbols indicate Tabby mackerel pattern cats. Pedigree segregating for domestic cat Tabby patterns and linked markers from cat chromosome B1. DNA was extracted from buccal cells from the cats representing the pedigree as previously described ( Oberbauer et al. Buccal cells were non-invasively obtained by swabbing the internal cheek of each cat with a cytological brush. Three marking patterns were used to demarcate the Tabby phenotypes: Abyssinian, mackerel and blotched ( Fig. 2) from the WALTHAM Centre for Pet Nutrition (Melton Mowbray, Leics, UK) was used for linkage analysis. An extended pedigree of 64 cats segregating for Tabby markings ( Fig. Therefore, a full-genome scan across the cat autosomes was performed to identify the locus for Tabby markings. In the mouse, loss-of-function alleles for the sex-linked ectodysplasin-A ( Eda) gene were originally described as ‘Tabby’, but this phenotype affects hair structure and is completely unrelated to the Tabby phenotypic patterns in cats ( Ferguson et al. The T m t b mackerel pattern may appear as the broken mackerel or spotted mackerel patterns however, these phenotypes have not segregated in pedigrees, and the spotted pattern may be affected by modifiers. Homozygous T a T a individuals have the same pattern on the torso but may have less barring on the legs and tail. The Abysinnian pattern is also known as ticked, the mackerel pattern as striped and the blotched pattern as classic. Tabby patterns in the domestic shorthair cats: (a) Abysinnian, T a-, (b) mackerel, T m T m or Tt b, and (c) blotched, t b t b. Hence, the T a allele can be considered co-dominant to T m and t b when considering the leg barring, but this demarcation has variable expression and is difficult to distinguish. Cats that are homozygous for the Abyssinian allele ( T a T a) may have less barring on the legs and can be distinguished from heterozygotes. However, traditional patterns are represented by three alleles: T a, which produces few markings and possible stripes on the head, legs and tail but not on the torso T m, which produces stripes on the head, legs, tail and torso and t b, which produces stripes on the head, legs and tail but circular patterns on the torso. Mackeral tabby cat series#The allelic series T a > T m > t b has been suggested however, this series is disputed because the Tabby coat patterns that form a distinctive spotted pattern cannot be explained with a single, allelic model. Cats with traditional patterns resulting from Tabby alleles are presented in Fig. Traditionally, three autosomal alleles have been suggested for Tabby: Abyssinian ( T a a.k.a. Coat colour striping patterns, commonly known as Tabby markings, are frequent in domestic cats, but a candidate is not available from other species. ![]()
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