©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 13 (1): 445-449 (2014) Genetic variation among quince (Cydonia oblonga Mill.) genotypes sampled from the Coruh valley in Turkey E. Orhan 1 , G. Nardemir 2 , G. Agar 2 and S. Ercisli 3 1 Department of Agricultural Biotechnology, Faculty of Agriculture, Erzurum, Turkey 2 Department of Biology, Faculty of Sciences, Ataturk University, Erzurum, Turkey 3 Department of Horticulture, Faculty of Agriculture, Erzurum, Turkey Corresponding author: S. Ercisli E-mail: sercisli@gmail.com Genet. Mol. Res. 13 (1): 445-449 (2014) Received August 15, 2013 Accepted October 18, 2013 Published January 21, 2014 DOI http://dx.doi.org/10.4238/2014.January.21.12 ABSTRACT. Turkey has very rich quince genetic resources, and the country currently dominates world quince production. In particular, the northeastern part of the country has notable Cydonia oblonga Mill. germplasm. Authenticating the identity of germplasm resources of C. oblonga Mill. would be of great value for breeding practices. In the present study, genetic variations of 14 C. oblonga Mill. genotypes sampled from the Coruh valley of Turkey were investigated. Ten random primers generated 53 DNA markers. The highest polymorphism ratio was observed in the OPA07 primer (86%), while the lowest was observed in OPA03 (29%). The percentage of polymorphic bands was 51%, which demonstrated the effciency of the primers used. The similarity matrix revealed that the similarity among genotypes ranged between 0.42 and 0.96. The identifed random amplifed polymorphic DNA markers enabled clear discrimination among all genotypes considered. Key words: Quince; Cydonia oblonga Mill.; RAPD; Genetic diversity