The Nucleus

, Volume 62, Issue 1, pp 31–38 | Cite as

Karyotype analysis and report on B-chromosome in Gloriosa superba L. by differential staining

  • Syeda Sharmeen SultanaEmail author
  • Chandan Kumar Dash
  • Sheikh Shamimul Alam
  • Md. Abul Hassan
Original Article


In this investigation Gloriosa superba L. was cytogenetically studied with orcein, CMA and DAPI-staining for authentic characterization. “Complex Chromocenter Type” of interphase nuclei with 3–4 bigger darkly stained heterochromatic regions was found in this species. The prophase chromosomes were “Interstitial Type” with darkly stained region at different interstitial sites of chromosomes. This species had 2n = 22 chromosomes with heterogenous centromeric formulae 14 m + 8 sm. In addition to the regular chromosomes, 1–6 small chromosomes were found in several mitotic pro-metaphase, metaphase and anaphase stage which covered 43.57% of the total cell count of this species suggesting the probable occurrence of B-chromosome. Presence of B-chromosome was probably the first report for this genus. After fluorescent banding, a pair of dot like CMA fluoresced bands were observed whereas no bright band was found in G. superba after DAPI-staining which suggested the coexistence of GC- and AT-base pairs in the genome. Thus, the compilation of the above information will be very useful for cytogenetical characterization of G. superba L. in Bangladesh.


Karyotype CMA DAPI B-chromosome Bimodality Gloriosa superba 



This research work was funded by Bangabandhu Science and Technology Fellowship Trust, Ministry of Science and Technology, Government of the Peoples’ Republic of Bangladesh.

Author’s Contribution

SSS—Field investigation, performing the experiment, data analysis, drafting manuscript; CKD—Material collection, performing the experiment, data analysis; SSA—Study design, originator of the research, interpretation of results; MAH—Study design, interpretation of results, critical revision and finalization of the manuscript.


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Copyright information

© Archana Sharma Foundation of Calcutta 2018

Authors and Affiliations

  1. 1.Department of BotanyUniversity of DhakaDhakaBangladesh

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