%0 Journal Article
%T Description of karyotype in Hypostomus regani (Ihering, 1905) (Teleostei, Loricariidae) from the Piumhi river in Brazil with comments on karyotype variation found in Hypostomus
%A Ernani de Oliveira Mendes-Neto
%A Marcelo Ricardo Vicari
%A Roberto Artoni
%A Orlando Moreira-Filho
%J Comparative Cytogenetics
%D 2011
%I Pensoft Publishers
%R 10.3897/compcytogen.v5i2.964
%X The paper represents a comparative cytogenetic analysis of three populations of Hypostomus regani in Brazil. Two populations belong to the Upper Paran¨¢ River Basin and the third one, the karyotype of which is described for the first time, was probably introduced into the S o Francisco River Basin through transposition from the Piumhi River. Karyotype features of populations of H. regani from the Piracicaba and Tiet¨º River Basins are also discussed. The occurrence of H. regani in the S o Francisco River Basin is reported for the first time here. The study also revealed distinct differences in the location of the Ag-NORs between the analyzed populations that enable individuals from the Piumhi River, Mogi-Gua u River and Tiet¨º River to be distinguished from one another. Thus, the data obtained indicate the possibility of geographic variation fixing different karyotypes even in the same basin of origin.
%K citotaxonomy
%K karyotype diversification
%K rDNA
%U http://www.pensoft.net/journals/compcytogen/article/964/