Genetic Differentiation and Diversity of European Silver Fir in Eastern Part of Its Natural Range : 7. IUFRO-Tannensymposium "Oekologie und Waldbau der Weisstanne"

Mainz

1995

S. 155-163

31 Lit. Ang.

Bandaufführung

77844

Genetic structure of seventy six populations of the European Silver Fir (Abies alba MILL.) was analyzed in order to determine the degree of genetic differentiation and genic diversity of this species in the eastern part of its natural range. By analyzing dormant bud tissues, fifteen isozyme gene loci were surveyed. Geographic distribution of allelic frequencies was found in Per-B, Idh-B, 6Pgd-A, Aco and Lap-A. In addition, the occurence of alleles Got-A3 and Got-B1 is limited to the Eastern Carpathians while Mdh-A1 is a gene typical for the Alpine-Hercynic populations of the silver fir. This fact well corresponds with the dissemination of silver fir to Central Europe from different glacial refugia. Observed heterozygosities (Ho) varied between 0.150 and 0.204, and expected heterozygosities (He) between 0.145 and 0.211 in analyzed populations. Apparently lower levels of heterozygosity were found in the central European (Hercynic mountains, Western Carpathians) populations especially in comparison with those from the Romanian Carpathians and Bulgaria. Genetic differentiation of the silver fir appears to be relatively continuous. Despite this fact, genetic distances do not correspond with the geographic distance between the Hercynic and Western-Carpathian, and the Western-Carpathian and Romanian populations. Maximal values of Nei's standard genetic distance (D=.048-.075) were found when allelic structures of the Hercynic (Czech Republic) and Southern-Carpathian (south-western Romania) populations were compared.