Banding pattern of A and B chromosomes of Prochilodus lineatus (Characiformes, Prochilodontidae), with comments on B chromosomes evolution |
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Authors: | Roberto Ferreira Artoni Marcelo Ricardo Vicari Alexandra Lidiane Endler Zélia Isabel Cavallaro Célia Maria de Jesus Mara Cristina de Almeida Orlando Moreira-Filho Luiz Antonio Carlos Bertollo |
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Institution: | Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus de Uvaranas, 84030-900, Ponta Grossa, PR, Brazil. rfartoni@uepg.br |
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Abstract: | B chromosomes in Prochilodus lineatus, a migratory neotropical fish, were analyzed in a comparative study among populations from the Dourada lagoon (State of Paraná, Brazil) and from Mogi-Guaçu river (State of São Paulo, Brazil). The data on C-banding and fluorescent in situ hybridization with a satellite DNA probe (SATH1), indicate that the small metacentric B chromosome might correspond to an isochromosome. On the other hand, both populations presented a distinct set of B chromosomes, differentiated either by their number and by the presence of variant B types in the population from Mogi-Guaçu river. The present results indicate that the B chromosomes of P. lineatus should have an ancient origin, and have undergone a differential evolutionary pathway among distinct populations. |
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Keywords: | B chromosomes isochromosomes Prochilodus lineatus repetitive DNA |
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