Analysis of genetic relatedness and inbreeding in Polish population of the Newfoundland dog breed

Analysis of genetic relatedness and inbreeding in Polish population of the Newfoundland dog breed. The aim of the study was to analyse the fi ve-generation pedigrees of Newfoundland dogs, registered in the Polish Kennel Club and shown in 2015 in Poland. Pedigrees come from the Polish Newfoundland Club website and their analysis was possible with the use of the international pedigree database (https:// www.newfoundlanddog-database.net/). Inbreeding coeffi cient (COI) and ancestor loss coeffi cient (AVK) were calculated and pedigrees were analysed for the presence of common ancestor. Results indicate low mean COI values, with individual values ranging from 0.78% to 7.03%. The mean kinship was 3.14. Five-generation pedigree analysis did not show high inbreeding in the population studied and AVK exceeded the suggested value of 85% only in one case. It can be thus concluded that the population of Polish Newfoundlands, at least its part, presented at shows in 2015 and most likely intended for breeding, is not to be considered inbred.