title: Banding pattern of A and B chromosomes of Prochilodus lineatus (Characiformes, Prochilodontidae), with comments on B chromosomes evolution.
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.
authors.affiliation: Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus de Uvaranas, 84030-900, Ponta Grossa, PR, Brazil. rfartoni@uepg.br
authors.forename: Roberto Ferreira
authors.initials: RF
authors.lastname: Artoni
authors.forename: Marcelo Ricardo
authors.initials: MR
authors.lastname: Vicari
authors.forename: Alexandra Lidiane
authors.initials: AL
authors.lastname: Endler
authors.forename: Zélia Isabel
authors.initials: ZI
authors.lastname: Cavallaro
authors.forename: Célia Maria
authors.initials: CM
authors.lastname: de Jesus
authors.forename: Mara Cristina
authors.initials: MC
authors.lastname: de Almeida
authors.forename: Orlando
authors.initials: O
authors.lastname: Moreira-Filho
authors.forename: Luiz Antonio Carlos
authors.initials: LA
authors.lastname: Bertollo
mesh_terms: D000818:Animals; D002503:Centromere; D002874:Chromosome Mapping; D020223:Chromosome Painting / Q000379:methods; D002875:Chromosomes; D003531:Cypriniformes / Q000235:genetics*; D004276:DNA, Satellite / Q000032:analysis; D019143:Evolution, Molecular; D005260:Female; D005787:Gene Frequency; D006570:Heterochromatin; D017404:In Situ Hybridization, Fluorescence; D018404:Isochromosomes / Q000502:physiology; D007621:Karyotyping; D008297:Male; D008677:Metaphase; D009697:Nucleolus Organizer Region / Q000378:metabolism; D011003:Ploidies; D016622:Silver Staining
chemical_list: D004276:DNA, Satellite; D006570:Heterochromatin