Abstract
Abstract. The aim of presented study was estimation of genetic relationship within and between 3 mentioned pig breeds bred in the Slovak Republic. Genetic variability at 10 microsatellite loci (SW24, SO107, SO068, SW936, sw353, so386, so355, sw72, tnfb, and SO070) was analysed in 412 pigs of Landrace, Yorkshire and Slovak White Improved breeds. Variation amount of each population was measured with average number of alleles per locus, heterozygosities, polymorphism information content (PIC) value were calculated. Phylogenetic trees were constructed by UPGMA. The average number of alleles per locus was 11.5, ranging from 7 (SW72) to 16 (SO068). The Slovak White Improved, Landrace and Yorkshire pig breeds showed out high degree of genetic diversity with mean expected heterozygosities of 0.720, 0.697 and 0.705 respectively. Genetic distance ranged from 0.060 between Yorkshire and Slovak White Improved to 0.203 between Landrace and Slovak White Improved breeds. The scatter diagram from principal component displayed genetic differentiation among all three breeds. A Bayesian method was applied for individual assigning testing. On the base of our results the group of Slovak White Improved population was strongly mixed with Yorkshire breed and the group of all Landrace individuals was presented as enclosed population.
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