Chromosome morphology and banding patterns in Hydra oligactis Pallas and H. circumcincta Schultze (Hydroidea, Hydrida)

• Authors: B. Anokhin , V. Kuznetsova
• Languages of publication: EN

Abstracts

EN

Karyotypes of Hydra oligactis Pallas, 1766 (2n = 30, FN = 60) and H. circumcincta Schultze, 1914 (2n = 30, FN = 56) were studied in mitosis and meiosis, using routine Giemsa-staining and C- and Ag-bandings. It was shown that in H. oligactis, C-blocks are situated in centromere regions of all chromosomes. In H. circumcincta, NORs were found to be present in one of the larger chromosome pairs. The species have no morphologically distinguished sex chromosomes. They differ from each other in chromosome morphology, showing 30 M/SM/ST in the former and 26M/SM + 4A in the latter.

Keywords

EN

BANDING PATTERN; CHROMOSOME MORPHOLOGY; HYDRA; HYDRIDA; HYDROIDEA; KARYOTYPE

Discipline

• EXPERIMENTAL_BIOLOGY_&_MEDICINE: EXPERIMENTAL BIOLOGY & MEDICINE

• Publisher: Institute of Systematics and Evolution of Animals, Polish Academy of Sciences
• Journal: Folia Biologica
• Year: 1999
• Volume: 47
• Issue: 3-4
• Pages: 91-96

Contributors

author

B. Anokhin

author

V. Kuznetsova

• Document Type: ARTICLE
• Publication order reference: B. Anokhin, Zoological Institute, Russian Academy of Sciences, Universitetskaya Nab. 1, St. Petersburg, 199034, Russia