Chromosomal Arrangements of Hybrid Individuals of Mesocricetus brandti (Nehring, 1898) (Mammalia: Rodentia)

 In this study, Mesocricetus brandti insert ignore into journalissuearticles values(Nehring, 1898); specimens collected from different area of Anatolia insert ignore into journalissuearticles values(Şebinkarahisar, Bolkar Mountain, Aksaray, Ardahan, Van); and Iran- Zanjan were examined. Chromosomal arrangements of these individuals were analyzed by using colchicine- hypotonic citrate karyotype technique. Diploid chromosome numbers of whole specimens were determined to be the same, being 2n=42; however fundamental number of chromosomal arms insert ignore into journalissuearticles values(FN); of these specimens had two forms; being FN=84 and FN=82. These two forms were mated in laboratory conditions and hybrid individuals insert ignore into journalissuearticles values(both male and female); obtained from interbreeding specimens of Zanjan insert ignore into journalissuearticles values(İran); which has 84 FN and Bolkar Mountain insert ignore into journalissuearticles values(Niğde, Turkey); which has 82 FN. It is determined that, these hybrid individuals have 83 chromosomal arms insert ignore into journalissuearticles values(FN); and one of homologous chromosomes of the 20 th autosomal pair is acrosentric and the other is metacentric.