Genetic Variability of two Fagus sylvatica (L.) Populations in the South-Western Edge of the Panonnian Plain

摘要

Two beech populations at altitudes of 273 m (Vrhovo) and 657 m (Kozarje), growing on\udsignificantly different forest site, in different ecological conditions and with different forestmanagement\udhistory were selected on Gorjanci Mountains and genetically investigated by means of\udisoenzyme analysis. A cline from minor to major allelic polymorphism was revealed at gene loci AcoB,\udIdh-A and 6-Pgdh-A. At locus Skdh-A, allele A4 was observed only at the lower altitude population\udVrhovo as a heterozygote genotype Skdh-A34 (12%). The Kozarje population of beech had a slightly\udhigher genetic multiplicity, a slightly higher effective number of alleles per locus, higher observed\udheterozygosity and a higher level of intrapopulation differentiation. Statistically significant differences\udin the occurrence of alleles between populations were found at 5 of 16 loci. The average genetic\uddistance of Gregorius (1974) was 6.1%. European beech populations analyzed from different altitudes\udon Gorjanci Mountains appeared to be genetically differentiated. The results presented are also\uddiscussed in the light of the climate change impact on forests.