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dc.contributor.authorOliveira, C.-
dc.contributor.authorForesti, F.-
dc.contributor.authorRigolino, M. G.-
dc.contributor.authorTabata, Y. A.-
dc.identifier.citationCaryologia, v. 49, n. 3-4, p. 335-342, 1996.-
dc.description.abstractCytogenetic 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.en
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 complexen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionCampos do Jordão-
dc.description.affiliationDepartamento de Morfologia Instituto de Biociências Universidade Estadual Paulista, 18618-000 Botucatu, São Paulo-
dc.description.affiliationEstacao Exp. de Salmonicultura Instituto de Pesca Campos do Jordão, São Paulo-
dc.description.affiliationUnespDepartamento de Morfologia Instituto de Biociências Universidade Estadual Paulista, 18618-000 Botucatu, São Paulo-
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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