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    Identification and Genomic Variability of Prune dwarf virus Variants Infecting Stone Fruit Trees in Turkey
    (Wiley, 2009) Ulubas Serce, C.; Ertunc, F.; Ozturk, A.
    Prune dwarf virus (PDV), a pathogen of stone fruit trees worldwide, shows a great variability in its biological, serological and molecular properties. The coat protein sequences of ten PDV variants from different stone fruit tree species in Turkey were determined. The sequence for each variant was 657 nucleotides in length. The phylogenetic analyses of the sequences of the Turkish variants and of additional sequences of other PDV variants from international databases indicate the existence of four groups of PDV variants: one contains cherry variants that differs in group specific conserved amino acids; a second contains one apricot and cherry variants, most members of the group being Turkish variants; a third contains mixed variants from cherry, peach, plum trees and an almond tree; and a fourth contains only variants from almond trees. Based on their hosts, we propose the nomenclature of these groups as cherry I, cherry II, mixed and almond groups, respectively.
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    Investigation of mealybug (Hemiptera: Coccoidea: Pseudococcidae) species from Turkey by RAPD
    (Priel Publ, 2007) Serce, C. Ulubas; Kaydan, M. B.; Kilincer, A. N.; Ertunc, F.
    Molecular markers are commonly used for determining the relationship between insect species. In this study, we investigated the relationship of six mealybug species, Planococcus citri (Risso), Planococcus ficus (Signoret), Planococcus vovae (Nasonov), Pseudococcus longispinus (Targioni Tozzetti), Pseudococcus viburni (Signoret) and Phenacoccus aceris (Signoret), sampled from Turkey, using randomly amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR). Of the 50 RAPD primers tested, 18 identified a total of 256 fragments of which all were polymorphic. Sufficient discrimination between P. citri and P ficus was provided by several RAPD primers. The genetic distance values calculated for each pair-wise comparison ranged from 0.156 to 0.504. Cluster analyses of RAPD data clearly separated the species into two groups.