Fluorescence in situ hybridization with rDNA probes on chromosomes of two nucleolus organizer region phenotypes of a species of Eigenmannia (Pisces, Gymnotoidei, Sternopygidae)

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDe Almeida-Toledo, Lurdes Foresti
dc.creatorStocker, Ann Jacob
dc.creatorForesti, Fausto
dc.creatorDe Almeida Toledo-Filho, Silvio
dc.date2014-05-27T11:18:06Z
dc.date2016-10-25T18:13:55Z
dc.date2014-05-27T11:18:06Z
dc.date2016-10-25T18:13:55Z
dc.date1996-07-27
dc.date.accessioned2017-04-06T00:47:33Z
dc.date.available2017-04-06T00:47:33Z
dc.identifierChromosome Research, v. 4, n. 4, p. 301-305, 1996.
dc.identifier0967-3849
dc.identifierhttp://hdl.handle.net/11449/64816
dc.identifierhttp://acervodigital.unesp.br/handle/11449/64816
dc.identifier10.1007/BF02263681
dc.identifierWOS:A1996UX42300008
dc.identifier2-s2.0-0030017655
dc.identifierhttp://dx.doi.org/10.1007/BF02263681
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/886602
dc.descriptionNucleolus organizer regions (NORs) were analysed in two related and geographically close populations of Eigenmannia sp.1 (Pisces, Gymnotoidei, Sternopygidae) using silver staining and fluorescence in situ hybridization (FISH). The two populations differed in their AS-NOR phenotypes, displaying fixed differences in the NOR-bearing chromosome pairs. FISH with rDNA probes showed that these differences were due to the location of rDNA cistrons. This finding, showing fixed NOR differences between two populations belonging to the same species in a connected river system, is highly significant in terms of evolutionary change, possibly indicating an initial step of genetic differentiation. This result also has important implications from the cytosystematic point of view, as NORs usually have a very constant karyotypic location in fish species and have been used as species-specific chromosome markers.
dc.languageeng
dc.relationChromosome Research
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCytogenetics
dc.subjectFluorescence in situ hybridization
dc.subjectGymnotoidei
dc.subjectNucleolus organizer region
dc.subjectPisces
dc.subjectribosome dna
dc.subjectanimal tissue
dc.subjectchromosome analysis
dc.subjectchromosome NOR
dc.subjectcistron
dc.subjectdna probe
dc.subjectevolution
dc.subjectfish
dc.subjectfluorescence in situ hybridization
dc.subjectnonhuman
dc.subjectpopulation genetics
dc.subjectpriority journal
dc.subjectsilver staining
dc.subjectAnimals
dc.subjectBrazil
dc.subjectChromosome Banding
dc.subjectDNA Probes
dc.subjectDNA, Ribosomal
dc.subjectElectric Fish
dc.subjectFemale
dc.subjectIn Situ Hybridization, Fluorescence
dc.subjectKaryotyping
dc.subjectMale
dc.subjectNucleolus Organizer Region
dc.subjectPhenotype
dc.subjectAnimalia
dc.subjectEigenmannia
dc.subjectEigenmannia sp.
dc.subjectSternopygidae
dc.titleFluorescence in situ hybridization with rDNA probes on chromosomes of two nucleolus organizer region phenotypes of a species of Eigenmannia (Pisces, Gymnotoidei, Sternopygidae)
dc.typeOtro


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