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Genetic differentiation of oak populations within the Quercus robur/Quercus petraea complex in Central and Eastern
D Gömöry1, I Yakovlev, P Zhelev
1Faculty of Forestry, Department of Botany, Technical University in Zvolen, Faculty of Forestry, T. G. Masaryka 24, SK-960 53 Zvolen, Slovakia. gomory@vsld.tuzvo.sk
Abstract:
Genetic structure of 25 indigenous populations of sessile and pedunculate oaks (Quercus petraea and Q. robur), originating from three geographical regions: Slovakia, Bulgaria and the Republic Mari-El (Russia), was investigated using isozyme markers. Mean number of alleles per locus ranged between 1.8 and 2.6 in Q. robur populations and from 2.0 to 3.0 in Q. petraea populations; slightly higher expected heterozygosity values were found in Q. robur compared to Q. petraea. One locus, coding for a substrate-nonspecific dehydrogenase, differentiated the two species. The interspecific component of gene diversity was 46.7% at this locus, compared to 0.4-7.8% at the remaining loci.
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