Differences in the number of nucleolus organizers in Chironomus tepperi shown by in situ hybridization
- 1 January 1978
- journal article
- research article
- Published by Springer Nature in Chromosoma
- Vol. 67 (1), 63-66
- https://doi.org/10.1007/bf00285648
Abstract
Two stocks of Chironomus tepperi could be isolated. One stock, N(IV)+, contains nucleolus organizers in chromosome I and IV, whereas the other one, N(IV)−, shows only one nucleolus in chromosome I. It is demonstrated by in situ hybridization with radioactive rRNA that the absence of the nucleolus in chromosome IV of stock N(IV)− is not related to an inactivation of the nucleolar DNA, as might have been suggested, but is due to the lack of ribosomal cistrons.Keywords
This publication has 5 references indexed in Scilit:
- Proportionate representation of rDNA and Balbiani ring DNA in polytene chromosomes of Chironomus tentansChromosoma, 1976
- A review of the genus Chironomus (Diptera, Chironomidae)Chromosoma, 1974
- On the mechanism of the methyl green-pyronin stain for nucleic acidsHistochemistry and Cell Biology, 1967