Health

Information Available

There is a lot of information available on the internet, a good place to start as looking at the Australian National Kennel Council web site and your state member body Web Sites; Dogs ACT, Dogs West, Dogs Queensland, Dogs NT, Dogs NSW, Dogs SA, Dogs Tasmania and Dogs Victoria.

DNA Testing

DNA tests are available for Rhodesian Ridgebacks through Orivet ( Orivet Rhodesian Ridgeback Products ) or Massey University DNA via Dogs Qld Web site (Massey University DNA)

Sajanak Ridgebacks obtain the Rhodesian Ridgeback Full Breed Profile testing for a number of items as summarised below

Diseases

  • Degenerative Myelopathy
  • Generalised Myoclonic Epilepsy (Rhodesian Ridgeback Type)

Traits

  • A Locus (Fawn/Sable;Tri/Tan Points)
  • Black Hair Follicular Dysplasia
  • Brown Coat Colour Profile
  • Coat Colour Dilution Alopecia
  • D (Dilute) Locus
  • E Locus - (Cream/Red/Yellow)
  • K Locus (Dominant Black)

DNA Profile

  • Canine DNA Profile (ISAG Canine 288 SNP Panel)

The Coefficient of Inbreeding- what is it?

The Coefficient of Inbreeding (COI) is defined as “The proportion of all variable gene pairs that are likely to be homozygous due to inheritance from ancestors common to the sire and dam.” As such it is a measure of the relatedness of two dogs and is calculated by examination of pedigrees. Some breeders now use commercial pedigree programmes for pedigree analysis and generation. Many of these can perform the COI calculation and it is now appearing on some pedigrees. It is recommended the calculation be performed on 10 generation pedigrees for better accuracy.

To provide an understanding of the numbers that follow, breeding of uncle to niece gives a COI of 12.5%, first cousins 6.25% and parent to offspring or brother/sister is a 25% COI (note these figures assume uncle, niece etc to be unrelated). Dogs with a high COI (higher numbers) are the products of inbreeding or line breeding. So the average Australian Ridgeback is the product of an uncle to niece breeding. US dogs are more closely related, and Swedish dogs, less related.

There is little information about the COI and opinions vary on what is a “good” COI and how much inbreeding is appropriate.