PEDIGREE ANALYSIS OF BANIJA SPOTTED PIG

Sa？etak Genetic diversity of local and autochthonous populations of pigs is contracting due to reduced population sizes of such populations. In recent decades special attention is given to the preservation of genetic diversity of local and autochthonous populations of pigs. The aim of this study was to estimate the genetic diversity and breed structure of BS pig breed using pedigree data. Complete pedigree file contained 721 animals of Banija spotted pig. The reference population contained all pigs born between 2010 and 2017. Quality and integrity of the pedigree information were evaluated by the following parameters: by the average number of maximum generations traced back, the average number of full generations, and the average number of complete equivalent generations. Genetic diversity of the population was described by the following parameters: average inbreeding coefficient (F), inbreeding rate (ΔF), effective population size (Ne), average relatedness, and effective number of founders (Nef). Generation intervals for four selection paths were expressed as average age of parents when the offspring were born. The average maximum number of generations was 2.47, average number of full generations was 1.50, while average number complete equivalent generations was 2.00. The inbreeding coefficient obtained by pedigree analysis was 3.68%. The inbreeding rate per generation was 1.74% and effective population size was 28.81. Average generation interval was 2.17 years. Results of the genetic diversity analysis by the pedigree data showed that further efforts in conservation of Banija spotted pig breed should be focused on the creating mating schemes with a goal to control of the rate of inbreeding and further loss of genetic diversity