Karyotypic characterization and constitutive heterochromatin in the grasshopper Stiphra robusta (Orthoptera proscopiidae).

@article{Souza2000KaryotypicCA,
  title={Karyotypic characterization and constitutive heterochromatin in the grasshopper Stiphra robusta (Orthoptera proscopiidae).},
  author={Maria Jos{\'e} de Souza and Rita de C{\'a}ssia de Moura},
  journal={Cytobios},
  year={2000},
  volume={101 398},
  pages={137-44}
}
Conventional analysis, C-banding, silver nitrate and base specific fluorochrome staining with chromomycin A3 (CMA3) were used to analyse the meiotic chromosomes of the grasshopper Stiphra robusta. Diploid numbers of 2n = 19 in the males and 2n = 20 in the females were observed. The chromosome complement comprised a graded series of uniarmed chromosomes, and the X chromosome was medium sized. The nucleolar organizer regions, restricted to the bivalent chromosomes 6, 7 and 8, were CMA3 positive.