The Rex Cat Association

The Joint Rex Breed Advisory Committee

 

SELKIRK REX (79L/79S)

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Introduction

This page is seen as a way of ensuring breeders can observe what is considered ‘best practice’ in their involvement with the Selkirk Rex and particularly in their Selkirk Rex breeding programmes.

 

 

 

Two blood types have been confirmed in Selkirk Rex - type A and type B.  Type A is dominant over type B.  This means a cat with type B blood is homozygous for B.  Type A cats can be either homozygous for A or heterozygous (carrying the B gene).  Cats with type B blood have strong antibodies against type A red blood cells.  These anti-A antibodies can cause two serious problems: Neonatal Isoerythrolysis (fading kitten syndrome) and transfusion reactions.

 

Aims

It is vital regular selective outcrossing be introduced and maintained to increase the gene pool and maintain stamina and health.  This is ‘best for the breed’ in its ongoing development.

 

Guidelines

Breeders and owners of Selkirk Rex and Selkirk Rex Variants are recommended to blood type test all their cats but more especially all breeding stock.   Blood type A kittens resulting from a mating between a type A stud and a type B queen may die within the first few days of life if allowed to suckle their mother’s colostrum.  It is also important to know that cats with the relatively rare type B blood can die if given a transfusion of the more common type A blood.

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PKD has been confirmed in Selkirk Rex.  Breeders are advised to buy only from PKD tested stock and to breed only with cats, including ALL outcrosses, which have been screened PKD clear under a recognised scheme (the FAB/PKD scheme in the UK).  It is advisable when importing a cat, to insist on a DNA test.

 

All cats used for outcrossing should be thoroughly researched, of sound temperament and free from any hereditary defects.

Breeders should ensure, to the best of their knowledge, that any Selkirk Rex from which they breed are of sound temperament, free from any hereditary defects, (including those listed in the GCCF Standard of Points), and conform as closely as possible to the Standard of Points (excluding the coat description where variants are concerned).

 

Selkirk Rex are not compatible with either Cornish Rex, Devon Rex or LaPerms.  Such matings are therefore highly undesirable.  The product of such matings will be registered on the Reference Register as “no recognised breed” and cannot be considered to be variants.  They cannot be used in any Rex breeding programme and should be placed on the non-active register.  It is considered to be in the best interest of the Selkirk Rex breed to keep it entirely separate from other incompatible Rex mutations.

 

Under no circumstances should any cat with Sphynx ancestry be introduced into the Selkirk Rex breed.  Selection for hairlessness contradicts the coat quality requirements for Rex cats.  The product of any matings between Sphynx and Selkirk Rex will be registered on the Reference Register as “no recognised breed”.  They cannot be considered to be variants nor be used in any Selkirk Rex breeding programme and should be placed on the non-active register.

 

Breeders shall ensure that any Selkirk Rex or Selkirk Rex Variants from which they breed, shall be registered with the GCCF in accordance with the Rules in force at the time.  It is recommended that the progeny from any matings that are not required for Selkirk Rex breeding, should be placed on the Non-Active Register to avoid the introduction of the Selkirk Rex gene into other varieties of pedigree cats.

 

Breeds approved for use in outcrossing are: British Shorthair (including longhaired Variants), Persian and Exotic (including Variants).  All other breeds are listed as non-approved.  In addition, for cats bred outside the UK, American Shorthair was an approved outcross until 31.12.97 when it was discontinued.

 

All other breeds are listed as non-approved.

 

Breeders will be encouraged to take advantage of any relevant official scheme, which may be devised by the Selkirk Rex BAC to test the soundness of the Selkirk Rex breed. 

 

Note: It is recommended where the colour of a cat is in question a DNA test, (where such a test exists), be arranged.

 

Registration Policy for Selkirk Rex (Breed 79L 79S)

Breeds approved for use in outcrossing are: British Shorthair (including longhaired Variants), Persian, Exotic (including Variants). Straight coated Selkirk Rex Variants are also allowed for breeding. In addition, American Shorthairs are permitted in the pedigrees of imported cats and their progeny. All other breeds are listed non-approved.

 

Full Register

Selkirk Rex with Full or Provisional recognition which have in their pedigrees within the preceding three generations only Selkirk Rex, Selkirk Rex Variants, British Shorthairs (including Variants), Persians or Exotics (including Variants), with the exception that the progeny of Selkirk Rex x Selkirk Rex matings shall be placed on the Supplementary Register. American

Shorthairs were an approved outcross until 31.12.97 and are permitted in the pedigrees of imported cats and their progeny. 

 

Supplementary Register

Selkirk Rex with Full or Provisional recognition which have in their pedigrees within the preceding three generations only Selkirk Rex, Selkirk Rex Variants, British Shorthairs (including Variants), Persians or Exotics (including Variants). American Shorthairs were an approved outcross until 31.12.97 and are permitted in the pedigrees of imported cats and their progeny. NB. The Selkirk Rex progeny of Selkirk Rex x Selkirk Rex matings shall be placed on the Supplementary Register. 

 

Experimental Register

Selkirk Rex with Preliminary recognition which have in their pedigrees within the preceding three generations only Selkirk Rex, Selkirk Rex Variants, British Shorthairs (including Variants), Persians or Exotics (including Variants). American Shorthairs were an approved outcross until 31.12.97 and are permitted in the pedigrees of imported cats and their progeny. 

 

Reference Register I

1. Selkirk Rex Variants (straight coated) with one or both parents Selkirk Rex, and which have in their pedigrees within the preceding three generations only Selkirk Rex, Selkirk Rex Variants, British Shorthairs (including Variants), Persians or Exotics (including Variants), shall be registered on the Reference Register with a Selkirk Rex Variant breed number. American Shorthairs were an approved outcross until 31.12.97 and are permitted in the pedigrees of imported cats and their progeny.

 

2. Selkirk Rex and Selkirk Rex Variants which have within the preceding three generations any non-approved breeds, shall be registered on the Reference Register as normal or rex coated of Selkirk type, with the exception of those cats listed below (Reference Register II)

 

NB When kittens with one or both parents registered on the Reference Register are, under this Registration Policy, eligible to be registered on the Supplementary or Experimental Register it is recommended that the person registering these kittens requests such registration and encloses documentary evidence of the three generations required. If this is not done the kittens may be registered on the Reference Register. 

 

Reference Register II

1. Any cats of Selkirk Rex appearance, either Rex or normal coated, with non-pedigree cats within the preceding three generations shall be registered as “no recognised breed” with no progression.

 

2. Any cats of Selkirk Rex appearance, either Rex or normal coated, with Devon Rex, Cornish Rex, LaPerm or Sphynx ancestry shall be registered as “no recognised breed” with no progression.

 

PKD Screening Scheme

A. Active and Non Active Register

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All Selkirk Rex, Selkirk Rex Variants and outcrosses used for breeding Selkirk’s shall be screened clear of PKD for both kittens to be registered on active or non-active register.

 

1. They have themselves been screened clear of PKD under a recognised scheme where the test is taken independently on a uniquely identified cat (FAB/PKD scheme in the UK). Official confirmation of the screening result is required.

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2. They are from parents deemed clear because of the results from the screening of cats (as in A.1) on every line of the pedigree in previous generations. Pedigree line in this case refers to both parents, or all 4 grandparents, 8 great-grandparents, 16 great-great-grandparents and so on, or any combination of the same inclusive of both the sire’s and dam’s ancestors.

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B. Genetic Register

1. Selkirk Rex and Selkirk Rex Variants which are not eligible for registration on the Active Register (because one or more lines of the pedigree have not been screened clear) shall be registered on the Genetic Register, or on the Non-Active Register if so requested by the breeder. Any such cats which are already registered on the Active Register shall be moved to the Genetic Register.

 

2. Selkirk Rex and Selkirk Rex Variants registered on the Genetic Register may be moved to the Active Register when they have been screened clear of PKD under a recognised scheme (FAB/PKD scheme in the UK). Official confirmation of the screening result is required.

 

3. Offspring of cats registered on the Genetic Register may only be registered on the Active Register if they have themselves been screened clear of PKD under a recognised scheme (FAB/PKD scheme in the UK). Official confirmation of the screening result is required. NB Cats registered on the Non-Active register may not be transferred to the Active Register via the Genetic Register, except at the request of the breeder and the current registered owner.

 

NOTE: Before the registration of any White Selkirk Rex or White Selkirk Rex Variant, a BAER certificate of freedom from deafness for the white parent(s) must be supplied to the GCCF.  For identification purposes cats must be micro chipped prior to testing.                              

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