An Analysis of the Genetic Relationships and Inbreeding in Tatra Shepherd Dogs Depending on the Type of Breeding
The aim of the study was the analysis of the structure of the population, relationship coefficients, and inbreeding trends in terms of: sex, breeding system, and inbreeding degree of Tatra Shepherd dogs. The breed's inbreeding rate was 6.34%, and for a standardised 4-generation population was 6.68%. The highest inbreeding rate was found in "non-champion-dogs" and in "Polish dog" groups consisting of males and females. The limit value FX was exceeded for 25.65% of Tatra dogs, and the critical value was exceeded for 11.52%. An increasing ancestor loss coefficient (AVK) was found, which may result in an increased number of inbred animals. In particular, this referred to female dogs in the nCH, PL, and Z groups, whereas a significant increase of AVK was observed in the group of male dogs from foreign kennels. The resulting COR values were 55.58% for males and 55.44% for females.