English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The family Characidae, one of the largest and more diversified fish families in the Neotropical region, is certainly not a monophyletic group, which is supported by the cytogenetic data showing its extensive chromosome variability. In this work, two species of the genus Serrapinnus, S. heterodon and S. piaba, from the São Francisco river basin were analyzed. Both species presented the same diploid number, 2n=52 chromosomes, and the same karyotypic formula, 16m+20sm+14st+2a. The heterochromatin distribution, evidenced by C-banding, was also similar between both species. On the other hand, two NORs were evidenced in S. heterodon, while a multiple NOR system was characterized in S. piaba, both confirmed by silver nitrate staining as well as by fluorescent in situ hybridization with 18S rDNA probe. Furthermore, two additional karyotypes (cytotypes) were observed in S. heterodon, with 15m+20sm+14st+3a and 17m+20sm+14st+la chromosomes, respectively, characterizing a structural chromosome polymorphism in the population. The differences between the three S. heterodon, karyotypic forms are probably due to pericentric inversions related to the 8th and 26th chromosome pairs.

caryologia

Karyotypic characterization of two species of the genus<i>Serrapinnus</i>(Characiformes, Characidae), with the description of a structural polymorphism in<i>S. heterodon</i>

Karyotypic characterization of two species of the genusSerrapinnus(Characiformes, Characidae), with the description of a structural polymorphism inS. heterodon