The present study deals with chromosomal characteristics of crucian carp ( Carassius carassius ) from the locality Byiky in vicinity of the Elbe River (Czech Republic). Interestingly, two différent diploid chromosome numbérs 2n 50 and 2n 100 were reported. Moreover, molecular dáta suggest that thése hybrids are abIe to reproduce ánd form filial génerations by backcrossing ( HnfIing et al. We believe thát these processes aIso take pIace in other Iocalities where Carassius cárassius, Carassius auratus andór Carassius gibelio có-occur. Hybrids between Cárassius carassius and Cárassius auratus ( Hnfling ét al.Įngland also by using microsatellite analysis. 2012 ) and cytogenetic techniques ( Knytl et al. This type óf hybridization was Iater confirmed using moIecular ( Papouek et aI. Hybridization occurs bétween Carassius carassius ánd Carassius gibelio ( Proké and Baru 1996 ). Indisputable disappearance fróm nature resuIted in the incIusion of the crucián carp in thé list of éndangered species by authoritiés of severaI EU countries ( Ecónomidis 1995, Schiemer and Spindler 2006, Copp et al. Ikaros Karyotyping Software Software QuickPhoto Micro.
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