Title:	Localization of 18S ribosomal genes in suckermouth armoured catfishes Loricariidae (Teleostei, Siluriformes) with discussion on the Ag-NOR evolution.
Authors:	ALVES, A. L. BORBA, R. S. de POZZOBON, A. P. OLIVEIRA, C. NIRCHIO, M. FORESTI, F.
Affiliation:	ANDERSON LUIS ALVES, CNPASA; RAFAEL SPLENDORE DE BORBA, UNESP Rio Claro-SP; ALLAN PIERRE POZZOBON, UNESP Rio Claro-SP; CLAUDIO OLIVEIRA, UNESP Botucatu-SP; MAURO NIRCHIO, UNIVERSIDAD DE ORIENTE, Venezuela; FAUSTO FORESTI, UNESP Botucatu-SP.
Date Issued:	2012
Citation:	Comparative Cytogenetics, Sofia, v. 6, n. 3, p. 315-321, 2012.
Description:	The family Loricariidae with about 690 species divided into six subfamilies, is one of the world?s largest fish families. Cytogenetic studies conducted in the family showed that among 90 species analyzed the diploid number ranges from 2n=38 in Ancistrus sp. to 2n=96 in Hemipsilichthys gobio Luetken, 1874. In the present study, fluorescence in situ hybridization (FISH) was employed to determine the chromosomal localization of the 18S rDNA gene in four suckermouth armoured catfishes: Kronichthys lacerta (Nichols, 1919), Pareiorhaphis splendens (Bizerril, 1995), Liposarcus multiradiatus (Hancock, 1828) and Hypostomus prope plecostomus (Linnaeus, 1758). All species analyzed showed one chromosome pair with 18S rDNA sequences, as observed in the previous Ag-NORs analyses. The presence of size and numerical polymorphism was observed and discussed, with proposing a hypothesis of the Ag-NOR evolution in Loricariidae.
Thesagro:	Peixe Citogenética
NAL Thesaurus:	Fish Cytogenetics Fluorescence in situ hybridization Loricariidae
DOI:	doi: 10.3897/CompCytogen.v6i3.2667
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPASA)