NDLI: Pericentromeric location of the telomeric DNA sequences on the European grayling chromosomes

Content Provider	Springer Nature Link
Author	Ocalewicz, K. Furgala Selezniow, G. Szmyt, M. Lisboa, R. Kucinski, M. Lejk, A. M. Jankun, M.
Copyright Year	2013
Abstract	The chromosomal characteristics, locations and variations of the C-band positive heterochromatin and telomeric DNA sequences were studied in the European grayling karyotype (Thymallus thymallus, Salmonidae) using conventional C-banding, endonucleases digestion banding, silver nitrate (AgNO3), chromomycin A3 and 4′,6-diamidino-2-phenylindole staining techniques as well as fluorescence in situ hybridization (FISH) and primed in situ labelling. Original data on the chromosomal distribution of segments resistant to AluI restriction endonuclease and identification of the C-banded heterochromatin presented here have been used to characterize the grayling karyotype polymorphism. Structural and length polymorphism of the chromosome 21 showing a conspicuous heterochromatin block adjacent to the centromere seems to be the result of the deletion and inversion. Two pairs of nuclear organizer regions (NOR)-bearing chromosomes were found to be polymorphic in size and displaying several distinct forms. FISH with telomeric peptide nucleic acid probe enabled recognition of the conservative telomeric DNA sequences. The karyotype of the thymallid fish is thought to experienced numerous pericentric inversions and internal telomeric sites (ITSs) observed at the pericentromeric regions of the six European grayling metacentric chromosomes are likely relics of the these rearrangements. None of the ITS sites matched either chromosome 21 or NOR bearing chromosomes.
Starting Page	409
Ending Page	416
Page Count	8
File Format	PDF
ISSN	00166707
Journal	Genetica
Volume Number	141
Issue Number	10-12
e-ISSN	15736857
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-10-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thymallus Salmonidae Fish cytogenetics Heterochromatin and chromosome polymorphism Interstitial telomeric sites FISH Life Sciences Animal Genetics and Genomics Plant Genetics & Genomics Human Genetics Microbial Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Animal Science and Zoology Insect Science

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