Abstract
The study was conducted in individual farm located in Warmia and Mazury voivodeship on Polish heath sheep (26 ewes and 2 rams) and Polish Pomeranian longwool sheep (37 ewes and 3 rams). All animals were subjected to the identification of the PrP prion protein gene. In Polish heath sheep two alleles (ALRR and ALRQ) and two genotypes (ALRR/ALRR and ALRR/ ALRQ) were found. In the case of Polish Pomeranian longwool sheep four alleles (ALRR, ALRQ, ALHQ and VLRQ) and four genotypes (ALRR/ALRR, ALRR/ALRQ, ALRR/ALHQ and ALRR/VLRQ) were found. Alleles and genotypes differed in terms of frequency. All tested sheep in both flocks were carriers of allele ALRR, genetically resistant to classical scrapie and atypical scrapie. Only 5 Polish Pomeranian longwool sheep ewes had allele VLRQ and should be eliminated from the flock. The obtained results identified the need to develop a breeding program, especially for the Polish Pomeranian longwool sheep, which aim should be to completely eliminate carriers of allele VLRQ, which is not resistant to the clinical form of the classical scrapie.
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