title: Chromosomal studies on ten species of notothenioid fishes (Notothenioidei: Bathydraconidae, Channichthyidae, Nototheniidae).
abstract: The results of a cytogenetic study conducted with banding and in situ hybridization techniques using ribosomal and telomeric probes on various species belonging to three families (Bathydraconidae, Channichthyidae and Nototheniidae) of the perciform suborder, Notothenioidei, are reported. The heterochromatin distribution and composition, nucleolar organiser and localisation of telomeric sequences seem to indicate that both in karyologically conservative families such as channichthyids and in families exhibiting greater karyological variability, certain DNA fractions like ribosomal genes and centromeric and telomeric DNAs are prone to some variability. This could play an important role in favouring or hampering chromosome rearrangements.
authors.affiliation: Istituto di Biologia e Genetica, Università Politecnica delle Marche, via Brecce Bianche, 60100 Ancona, Italy. vcaputo@unian.it
authors.forename: V
authors.initials: V
authors.lastname: Caputo
authors.forename: P
authors.initials: P
authors.lastname: Nisi Cerioni
authors.forename: A
authors.initials: A
authors.lastname: Splendiani
authors.forename: T
authors.initials: T
authors.lastname: Capriglione
authors.forename: G
authors.initials: G
authors.lastname: Odierna
authors.forename: E
authors.initials: E
authors.lastname: Olmo
mesh_terms: D000818:Animals; D000864:Antarctic Regions; D005075:Biological Evolution; D002871:Chromosome Banding; D005399:Fishes / Q000235:genetics*; D015321:Gene Rearrangement; D006570:Heterochromatin / Q000235:genetics; D017403:In Situ Hybridization; D007621:Karyotyping; D009697:Nucleolus Organizer Region; D016622:Silver Staining; D013045:Species Specificity; D016615:Telomere / Q000235:genetics
chemical_list: D006570:Heterochromatin