The karyotype and NOR phenotype of Telestes ukliva (Cyprinidae)

作者：Valic Damir^*; Kapetanovic Damir; Zanella Davor; Mrakovcic Milorad; Teskeredzic Emin; Besendorfer Visnja; Rabova Marie; Rab Petr

来源：Folia Zoologica, 2010, 59(2): 169-173.

• fish cytogenetics and cytotaxonomy
• chromosome banding
• multiple nucleolar organizer region (NOR)
• leuciscine cyprinids

The karyotype and major ribosomal sites as revealed by silver staining and CMA(3)-fluorescence of Croatian leuciscine cyprinid endemic to Cetina River, Telestes ukliva were studied. The diploid chromosome number was invariably 2n = 50. Karyotype consisted of eight pairs of metacentric, 13 pairs of submetacentric and four pairs subtelocentric chromosomes. The largest chromosome pair of the complement was subtelocentric, which is a characteristic cytotaxonomic marker for all representatives of the cyprinid lineage Leuciscinae. The nucleolar organizer regions (NORs) were detected in the telomeres of two pairs of medium-sized submetacentric chromosomes. Staining with CMA(3) revealed four positive signals that corresponded to NOR sites. No heteromorphic sex chromosomes were found. The karyotype pattern of T. ukliva is nearly identical to that found in most other representatives of the Eurasian leuciscine cyprinids, while the multiple NOR phenotype appears to be more derived as opposed to a uniform one NOR-bearing chromosome pair, ubiquitous in this group.

• 出版日期2010-7