Genetic structure and taxonomic position of Pinus uliginosa Neumann population from Wielkie Torfowisko Batorowskie in Stołowe Mts. (locus classicus)

Genetic structure of Pinus uliginosa Neumann from Wielkie Tor-fowisko Batorowskie peat-bog ( locus classicus ) was studied by means of isoenzyme variability and compared with genetic structure of P. mugo Turra from Tatra Mts and P. sylvestris populations from Klodzka Valley and Czersk. The level of genetic variability in the population of P. uliginosa (heterozygosity, genotypic polymorphism) was similar to that in populations of P. mugo , with an excess of homozygosity in relation to Hardy-Weinberg equilibrium. An average number of alleles per locus in population of P. uliginosa is the same as in the studied P. sylvestris populations, but the average number of genotypes is slightly lower. However, populations of P. mugo from montaneus stands in Tatra Mts. are characterized by a higher number of alleles per locus than that in P. uliginosa population.In populations of P. mugo from peat-bogs, a lower number of alleles and genotypes is noted than in P. uliginosa population. The coefficients of genetic similarity (Nei and Hedrick) show the distinctly separate character of P. uliginosa as compared to P. sylvestris and loose relationship of this taxon to P. mugo . Also the measure of genetic differentiation of populations (G ST ) confirms the specificity of this pine taxon.