We bought our dog Sampo from a farm on the island of Kemiö in Finland, in February 2006. The lady of the farm told us that they had deliberately let their mixed-breed dog mate with the neighbour's dog, which was also of mixed-breed. She told me that there were five different breeds in Sampo: Samoyed, Husky, Lapponian Herder, Golden Retriever and Border Collie.
In the statistics below, we give you an updated overview to genome-wide measured genetic diversity levels in different breeds. This table helps you get an understanding of what kind of differences there may be between breeds in terms of heterozygosity. The information gets updated with each new tested dog in the MyDogDNA database and thus refers always to the latest data available.
A canine research group, led by Thomas Bellumori, from the University of California Davis has mapped the prevalence of 22 different hereditary disorders using health information from 27 254 dogs from a major animal hospital in the United States. With this huge amount of data they were able to compare the prevalence of some of the known hereditary diseases between different breeds.