Karyotype, ribosomal genes, and telomeric sequences in the crayfish Procambarus clarkii (Decapoda: Cambaridae)

Autor:	Susanna Salvadori, Rita Cannas, Anna Maria Deiana, Andrea Sabatini, Cinzia Lobina, Federica Deidda, Angelo Cau, Elisabetta Coluccia
Rok vydání:	2014
Předmět:	Procambarus clarkii Genetics biology Meiosis Heterochromatin Chromosome Karyotype Aquatic Science Ribosomal RNA Nucleolus organizer region biology.organism_classification Cambaridae
Zdroj:	Journal of Crustacean Biology. 34:525-531
ISSN:	1937-240X 0278-0372
DOI:	10.1163/1937240x-00002247
Popis:	Mitotic and meiotic chromosomes of the crayfish Procambarus clarkii (Girard, 1852) were characterized by means of heterochromatin staining techniques (C-, DAPI- and CMA3-bandings), and FISH of major ribosomal genes and telomeric pentameric repeat (TTAGG)n. Nucleolar organizer regions have been located on four chromosome pairs. GC-rich heterochromatin was mostly associated with NORs, and brightly fluorescent centromeric/pericentromeric AT-rich bands were present in most chromosomes. Telomeric pentameric repeats (TTAGG)n, occurred in all the P. clarkii telomeres and in the interstitial region of the largest chromosome pair, not co-located to ribosomal genes; as possible explanation of the origin of this chromosome, a fusion event was hypothesized.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::75c4ec022b16c8199c30abe950cfd81e https://doi.org/10.1163/1937240x-00002247 Zobrazit plný text záznamu