Paracentric inversion involving a NOR-bearing chromosome of rainbow trout (Oncorhyncus mykiss): Electron microscopy studies of the synaptonemal complex

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorOliveira, C.
dc.creatorForesti, F.
dc.creatorRigolino, M. G.
dc.creatorTabata, Y. A.
dc.date2014-05-27T11:18:05Z
dc.date2016-10-25T18:13:54Z
dc.date2014-05-27T11:18:05Z
dc.date2016-10-25T18:13:54Z
dc.date1996-07-01
dc.date.accessioned2017-04-06T00:47:28Z
dc.date.available2017-04-06T00:47:28Z
dc.identifierCaryologia, v. 49, n. 3-4, p. 335-342, 1996.
dc.identifier0008-7114
dc.identifierhttp://hdl.handle.net/11449/64805
dc.identifierhttp://acervodigital.unesp.br/handle/11449/64805
dc.identifier10.1080/00087114.1996.10797378
dc.identifierWOS:A1996WT92800014
dc.identifier2-s2.0-0002797175
dc.identifierhttp://dx.doi.org/10.1080/00087114.1996.10797378
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/886592
dc.descriptionCytogenetic studies conduced on a sample of 19 specimens of rainbow trout (Oncorhyncus mykiss) showed that 6 presented two chromosomes with a single subterminal AgNOR on the short arms and 13 presented one chromosome with a single subterminal Ag-NOR and a second chromosome with two small subterminal Ag-NORs. Synaptonemal complex studies showed the presence of a pairing failure involving the two lateral elements (LEs) of the NOR-bearing chromosomes only in those specimens with two different NOR-bearing chromosomes, suggesting that the chromosomes with two Ag-NORs originated from a paracentric inversion involving a terminal segment of the original NOR-bearing chromosome. A comparative analysis between three normal and three heterozygous fishes suggest that in the latter group the LEs of the NOR-bearing chromosomes initiate the synaptic process in a more delayed manner, the synapsis develops more quickly, and the nucleolus stays associated with chromosomes for a longer time.
dc.languageeng
dc.relationCaryologia
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectMeiosis
dc.subjectNORs
dc.subjectParacentric inversion
dc.subjectRainbow trout
dc.subjectSynaptonemal complex
dc.titleParacentric inversion involving a NOR-bearing chromosome of rainbow trout (Oncorhyncus mykiss): Electron microscopy studies of the synaptonemal complex
dc.typeOtro


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