Banding pattern of A and B chromosomes of Prochilodus lineatus (Characiformes, Prochilodontidae), with comments on B chromosomes evolution.
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.
Artoni
Roberto Ferreira
RF
Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus de Uvaranas, 84030-900, Ponta Grossa, PR, Brazil. rfartoni@uepg.br
Vicari
Marcelo Ricardo
MR
Endler
Alexandra Lidiane
AL
Cavallaro
Zélia Isabel
ZI
de Jesus
Célia Maria
CM
de Almeida
Mara Cristina
MC
Moreira-Filho
Orlando
O
Bertollo
Luiz Antonio Carlos
LA
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
D004276:DNA, Satellite; D006570:Heterochromatin