Allelic and Genotypic variations of 13 European Beech (Fagus sylvatica L.) - Populations in Hesse, Germany

2001

S. 13-24

1 Abb., 7 Tab., 36 Lit. Ang.

Unselbständiges Werk

200090036

Allelic and genotypic variation at seven different enzyme loci of European beech (Fagus sylvatica L.) was investigated in 13 108-160-years-old stands growing in 9 different growing areas in Hesse in central Germany. At the loci Aat-C, Acp-D, Acp-F, Dia-B, Idh-A, Lap-A and Per-D 18 alleles and 34 genotypes were quantified. The rare allele B1 at locus Dia-B was observed in only 5 of 13 stands, the rare allele A1 at locus Lap-A was missing in one stand. The effective number of alleles (Ne) varied little from stand to stand, maximum Ne-values per gene locus were stand dependent. The genetic identity of the 13 stands was high, I = 99.27 %. Values of subpopulation differentiation ranged from Dj=0.025-0.073. The 13 stands can be clustered to five groups according to their genetic distances do-total; grouping stand dependent but independent on the growing area in which the stands occur. Values of expected heterozygosity varied from H1 = 5.82 % at locus Dia-B to 70.92 % at locus Lap-A. However, heterozygosities varied little from stand to stand (He = 36.98 to 41.58 %). Of the 78 possible pairs of stands, 49 pairs (62.82 %) showed different genotype frequencies at a total of 12 genotypes. Comparing genotype frequencies in one stand with those of the 12 remaining stands showed that 10 out of 13 stands (76.92 %) differed in at least one genotype. Enlarging the number of investigated enzyme loci would probably allow to differentiate all stands.