caa a22 4500 44530166X CHVBK 20180317142600.0 cr unu---uuuuu 170323e20100801xx s 000 0 eng 10.1007/s13237-010-0006-9 doi (NATIONALLICENCE)springer-10.1007/s13237-010-0006-9 Molecular cytogenetics of Astyanax ribeirae (Teleostei, Characidae), an endemic characin of the Atlantic rainforest [Elektronische Daten] [Karine Kavalco, Rubens Pazza, Lurdes de Almeida-Toledo] Astyanax ribeirae is a characin fish endemic to Ribeira de Iguape river basin, Brazil. Karyotypic analysis of the specimen from distinct geographic regions depicted similar karyotypic features, i.e. 2n = 50 constituting the 4M + 10SM + 6ST + 30A and a fundamental number (FN) equal to 70. Further analysis on linear differentiation using silver nitrate staining, c-banding and rDNA localization revealed single NOR on ST/A chromosomes, heterochromatin blocks in the pericentromeric region of some chromosomes, and four 18S rDNA sites and six 5S rDNA sites, all located on ST/A chromosomes. FISH with As-51 satellite DNA probe presented no homology signals in chromosomes of A. ribeirae, indicating uniqueness of species within the genus Astyanax. The chromosomal and molecular cytogenetic data obtained on A. ribeirae specimens collected from Atlantic rainforest areas are discussed to elucidate relationship between this species and other species in the genus vis-à-vis chromosomal evolution of the group. This is the first report on cytogenetic analysis of Astyanax ribeirae. Archana Sharma Foundation of Calcutta, 2010 Characiformes nationallicence Ecological genetics nationallicence FISH nationallicence Karyotype nationallicence Chromosome evolution nationallicence Kavalco Karine Laboratório de Genética Ecologica e Evolutiva, Universidade Federal de Viçosa, Campus de Rio Paranaíba. Rodovia BR 354 - km 310, Po. Box22, ZIP 38810-000, Rio Paranaíba, MG, Brazil aut Pazza Rubens Laboratório de Genética Ecologica e Evolutiva, Universidade Federal de Viçosa, Campus de Rio Paranaíba. Rodovia BR 354 - km 310, Po. Box22, ZIP 38810-000, Rio Paranaíba, MG, Brazil aut de Almeida-Toledo Lurdes Instituto de Biociências, Departamento de Genética e Biologia Evolutiva, Universidade de São Paulo, Rua do Matão, 277—Edifício André Dreyfus, Cidade Universitária, ZIP 05508090, São Paulo, SP, Brazil aut The Nucleus Springer-Verlag 53/1-2(2010-08-01), 51-54 0029-568X 53:1-2<51 2010 53 13237 https://doi.org/10.1007/s13237-010-0006-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13237-010-0006-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kavalco Karine Laboratório de Genética Ecologica e Evolutiva, Universidade Federal de Viçosa, Campus de Rio Paranaíba. Rodovia BR 354 - km 310, Po. Box22, ZIP 38810-000, Rio Paranaíba, MG, Brazil aut NATIONALLICENCE 700 1- Pazza Rubens Laboratório de Genética Ecologica e Evolutiva, Universidade Federal de Viçosa, Campus de Rio Paranaíba. Rodovia BR 354 - km 310, Po. Box22, ZIP 38810-000, Rio Paranaíba, MG, Brazil aut NATIONALLICENCE 700 1- de Almeida-Toledo Lurdes Instituto de Biociências, Departamento de Genética e Biologia Evolutiva, Universidade de São Paulo, Rua do Matão, 277—Edifício André Dreyfus, Cidade Universitária, ZIP 05508090, São Paulo, SP, Brazil aut NATIONALLICENCE 773 0- The Nucleus Springer-Verlag 53/1-2(2010-08-01), 51-54 0029-568X 53:1-2<51 2010 53 13237 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer