In this study the occurrence of cytological variation in transgenic birch plants produced by infecting calli with Agrobacterium tumefaciens has been studied. And genetic variation between transgenic plant population and control population has been analyzed by RAPD.The comparison of Polymorphism index produced in previous analyses of transgenic plants and transgenic birch obtained by infecting calli with Agrobacterium tumefaciens has also been analyzed. This study also analysed the influence of different int...