DIGITALNA ARHIVA ŠUMARSKOG LISTA
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GENETIC STRUCTURE OF EUROPEAN BEECH (Fagus sylvatica L.) SEED STANDS FROM DIFFERENT FOREST SITES OF GORJANCI MOUNTAINS AS REVEALED BY ISOENZYMES GENETSKA STRUKTURA SJEMENSKIH SASTOJINA OBIČNE BUKVE (Fagus sylvatica L.) S RAZLIČITIH ŠUMSKIH STANIŠTA NA GORJANCIMA/ŽUMBERKU UTVRĐENA METODOM IZOENZIMA Gregor BOŽIČ, Mladen IVANKOVIĆ, Lado KUTNAR Summary Two populations of registered European beech seed stands growing at altitudes of 273 m (Vrhovo) and 657 m (Kozarje) a.s.l. in the Gorjanci Mountains were genetically investigated at 16 polymorphic gene loci. A cline from minor to major allelic polymorphism was revealed at gene loci Aco-B, Idh-A and 6-Pgdh-A. The Kozarje population of beech had a slightly higher genetic multiplicity, a slightly higher effective number of alleles per locus (ν), higher observed heterozygosity (Ho) and a higher level of intrapopulation differentiation (δT). Statistically significant differences in the occurrence of alleles between populations were found at 5 of 16 loci. The average genetic distance of Gregorius (1974) was 6.1 %. European beech populations analyzed from different altitudes on Gorjanci Mountains appeared to be genetically differentiated. KEY WORDS: European beech, genetic polymorphism, genetic differentiation, Slovenia Introduction Uvod Slovenia is one of the most forested countries in Europe, with a total coverage of 1.184.369 ha or 58.4 % of total area (SFS 2011). Forests are well preserved, and sustainable, semi-natural and multifunctional management has been traditionally and legally incorporated into the forestry practice. In the 1990s, the genetic variation of beech populations in Slovenia and, in comparison, with its variation in Central and South-Eastern Europe were studied using isoenzyme gene markers (Brus et al. 1999, Gömöry et al. 1999). Results have shown the existence of genetic differences between provenances of beech from the north-western part of the investigated area and provenances of beech from the eastern part of Balkan Peninsula. The obtained results further supported the hypothesis that during the ice ages European beech was present in microrefugia at the south-eastern periphery of Alps and on the territory of present-day Slovenia (Brus et al. 2000). Findings were confirmed by the |