Allozyme Variation of Indigenous Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) Populations and their Descendants in Germany

1995

S. 222-225

20 Lit. Ang.

Unselbständiges Werk

200051565

Twenty-three populations of autochthonous Douglas-fir from British Columbia and Washington and from their descendants field-tested in the IUFRO- provenance trial at German sites were sampled to document early genetical impacts of species translocation. Tissue of vegetative buds was surveyed for allozyme variation at five loci. Coastal varieties revealed higher allozyme variation than interior populations. Allele frequencies were not significantly different in North American populations versus German cohorts. Unique allozymes were both detected in native and translocated populations. All loci studied were characterized by minor polymorphisms (frequency of the most common allele greater than 0.9) and therefore aggravate conclusions. Based on the comparably small number of marker genes that were used and the limited time during evolution could act there is no evidence that a translocation imposes different evolutionary forces detectable at the loci under study. Reasons for this lack of noticeable genetic differentiation between native and translocated Douglas-fir populations are discussed.