Activity of Embryonic Mink Genome during Diapause
(Cytogenetic Analysis): Nucleolar
and Extranucleolar RNA Synthesis

G. K. Isakova, L. P. Zakharenko, and M. P. Abramova

Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences,
pr. Akademika Lavrent’eva 10, Novosibirsk, 630090 Russia

Received December 7, 1999; in final form, April 27, 2000

Abstract—The nucleolar and extranucleolar RNA synthesis was studied in the mink blastocysts at different
stages of embryonic diapause and during the periimplantation period using cytoradioautography. The data
obtained suggest a differential and stage specific activity of the embryonic mRNA and rRNA synthesis during
the period of delayed implantation.

Key words: mink, blastocysts, delayed implantation, embryonic diapause, genome activity, RNA synthesis


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