Genetic differentiation and phylogenetic relationships among six Abies species from European and Turkish areas

The phylogenetic relationships of the Abies species in European and Turkish regions have frequently been an object of controversial conclusions. Therefore, we compared the genetic structures of 21 populations belonging to six Abies species which are native to  entral, eastern and south-eastern European regions and  different areas in the Turkey (Asia minor). We used the allele frequency distribution of five isozyme gene locialready showing a high discriminatory power to assess the genetic differentiation among the Abies populations. The UPGMA-dendrogram based on genetic distances showed a clear discrimination between the Turkish Abies species and A. alba from Europe. The particular allele frequency distributions at the isozyme loci PGI-A and 6PGDH-Aconfirmed a great genetic dissimilarity between A. alba and the Turkish Abies species.These results contradict the phylogenetic relationships of the Abies species postulated inother studies.