Comparative chromosome mapping of U2 snRNA and 5S rRNA genes in Gymnotus species (Gymnotiformes, Gymnotidae): evolutionary dynamics and sex chromosome linkage in G . pantanal.
作者： Ricardo Utsunomia , Priscilla C. Scacchetti , José C. Pansonato-Alves , Claudio Oliveira , Fausto Foresti
DOI: 10.1159/000362258
关键词: Ribosomal RNA 、 Gymnotus 、 Small nuclear RNA 、 Biology 、 Gene 、 Molecular cytogenetics 、 Genetics 、 Chromosome 、 Y chromosome 、 5S ribosomal RNA
摘要: A comparative mapping of U2 small nuclear RNA (snRNA) and 5S ribosomal (rRNA) genes was performed in 6 Gymnotus species. All species analyzed presented the snDNA organized conspicuous blocks not co-located with rRNA genes. In addition, 5 showed located a single pair chromosomes, which seems to be conserved trait this genus. Conversely, G. pantanal only displaying several terminal signals different chromosome pairs, including X1 sex but Y chromosome. This is first report snRNA chromosomes fishes. The absence sites indicates possible loss segments involved formation.
karger.com 
sci-hub.se 参考文章(36)
J.W. IJdo, R.A. Wells, A. Baldini, S.T. Reeders, Improved telomere detection using a telomere repeat probe (TTAGGG)ngenerated by PCR Nucleic Acids Research. ,vol. 19, pp. 4780- 4780 ,(1991) , 10.1093/NAR/19.17.4780
Manuel A Merlo, Tiziana Pacchiarini, Silvia Portela-Bens, Ismael Cross, Manuel Manchado, Laureana Rebordinos, Genetic characterization of Plectorhinchus mediterraneus yields important clues about genome organization and evolution of multigene families BMC Genetics. ,vol. 13, pp. 33- 33 ,(2012) , 10.1186/1471-2156-13-33
Octavio M Palacios-Gimenez, Elio R Castillo, Dardo A Martí, Diogo C Cabral-de-Mello, None, Tracking the evolution of sex chromosome systems in Melanoplinae grasshoppers through chromosomal mapping of repetitive DNA sequences BMC Evolutionary Biology. ,vol. 13, pp. 167- 167 ,(2013) , 10.1186/1471-2148-13-167
D. C. Cabral-de-Mello, G. T. Valente, R. T. Nakajima, C. Martins, Genomic organization and comparative chromosome mapping of the U1 snRNA gene in cichlid fish, with an emphasis in Oreochromis niloticus Chromosome Research. ,vol. 20, pp. 279- 292 ,(2012) , 10.1007/S10577-011-9271-Y
Nathan R. Lovejoy, Kristie Lester, William G.R. Crampton, Fernando P.L. Marques, James S. Albert, Phylogeny, biogeography, and electric signal evolution of Neotropical knifefishes of the genus Gymnotus (Osteichthyes: Gymnotidae). Molecular Phylogenetics and Evolution. ,vol. 54, pp. 278- 290 ,(2010) , 10.1016/J.YMPEV.2009.09.017
P.C. Scacchetti, J.C.P. Alves, R. Utsunomia, F.L. Claro, L.F. de Almeida Toledo, C. Oliveira, F. Foresti, Molecular Characterization and Physical Mapping of Two Classes of 5S rDNA in the Genomes of Gymnotus sylvius and G. inaequilabiatus (Gymnotiformes, Gymnotidae) Cytogenetic and Genome Research. ,vol. 136, pp. 131- 137 ,(2012) , 10.1159/000335658
Priscilla Scacchetti, Jose Pansonato-Alves, Ricardo Utsunomia, Claudio Oliveira, Fausto Foresti, Karyotypic diversity in four species of the genus Gymnotus Linnaeus, 1758 (Teleostei, Gymnotiformes, Gymnotidae): physical mapping of ribosomal genes and telomeric sequences Comparative Cytogenetics. ,vol. 5, pp. 223- 235 ,(2011) , 10.3897/COMPCYTOGEN.V5I3.1375
Susana S. R. Milhomem, Priscilla C. Scacchetti, Julio C. Pieczarka, Malcolm A. Ferguson-Smith, José C. Pansonato-Alves, Patricia C. M. O’Brien, Fausto Foresti, Cleusa Y. Nagamachi, Are NORs Always Located on Homeologous Chromosomes? A FISH Investigation with rDNA and Whole Chromosome Probes in Gymnotus Fishes (Gymnotiformes) PLoS ONE. ,vol. 8, pp. e55608- ,(2013) , 10.1371/JOURNAL.PONE.0055608
L. F. De Almeida Toledo, H. Foresti, S. De Almeida Toledo Filho, Complex sex chromosome system in Eigenmannia sp. (Pisces, Gymnotiformes) Genetica. ,vol. 64, pp. 165- 169 ,(1984) , 10.1007/BF00115340
D. Pinkel, T. Straume, J. W. Gray, Cytogenetic analysis using quantitative, high-sensitivity, fluorescence hybridization. Proceedings of the National Academy of Sciences of the United States of America. ,vol. 83, pp. 2934- 2938 ,(1986) , 10.1073/PNAS.83.9.2934