Restriction fragment analysis of the chloroplast gene psbA was carried out in twelve Abies species native to Asia, Europe and North America using the four restriction enzymes. The pair of Asiatic representatives of A. koreana and A. veitchii differed profoundly not only from each other but also with respect to the European and Northamerican species. The variation observed within the last mentioned groups of firs was mainly due to the different restriction profiles of the gene in A. alba and A. nordmanniana species of the former region as well as owing to its heterogenous nature in all the four species from North America. The RFLP data presented to far only partially correlate with the taxonomic status and hybridological relationships of the species concerned.
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