Identification of regions of constitutive heterochromatin and sites of ribosomal DNA (rDNA) in Rhogeessa hussoni (Genoways & Baker, 1996) (Chiroptera; Mammalia; Vespertilionidae)

There is scarce information a bout the geographical distribution, biological and cytogenetic data from the Rhogeessa hussoni. This study aims to characterize its chromosome composition through chromosome bandings to visualize regions of constitutive heterochromatin (CGB bands) and sites of ribosomal DNA (rDNA) in R. hussoni's karyotype. A female specimen of R. hussoni was collected in the Parque Municipal Mario Viana Conservation Unit, Nova Xavantina, Mato Grosso, Central-West region of Brazil. The karyotype constitution was 2n=52 and N F=54. The CB G bands evidenced a sex X chromosome nearly completely constituted by heterochromatin. The Rhogeessa hussoni has two sites of rDNA located in a single pair (pair 25) of autosomal chromosomes. We carried out the first cytogenetic characterization of R. hussoni,supplementing knowledge about regions of heterochromatin and ribosomal DNA in this species, thus contributing to future elucidations about the genetic diversification in the genus Rogheessa.

Automated summary

This study characterized the chromosome composition of Rhogeessa hussoni, revealing a chromosome constitution of 2n=52 and NF=54. The research also identified regions of heterochromatin and sites of ribosomal DNA in this species.