Chromosome location of the ribosomal RNA genes in Triturus vulgaris meridionalis (Amphibia, Urodela)
Authors:
- 1 January 1977
- journal article
- research article
- Published by Springer Nature in Chromosoma
- Vol. 64 (1) , 67-84
Abstract
Ribosomal genes have been localized on mitotic and lampbrush chromosomes of 20 specimens of Triturus vulgaris meridionalis by in situ hybridization with 3H 18S+28S rRNA. The results may be summarized as follows: 1) each individual shows positive in situ hybridization at the nucleolus organizing region (NOR) on chromosome XI; 2) in addition, many specimens exhibit a positive reaction in chromosomal sites other than the NOR (additional ribosomal sites); 3) the chromosomal distribution of the additional sites appears to be identical in different tissues from the same specimen and to follow a specific individual pattern; 4) the additional ribosomal sites are preferentially found at the telomeric, centromeric or C-band regions of the chromosomes involved.Keywords
This publication has 24 references indexed in Scilit:
- Size of ribosomal DNA repeating units in Xenopus laevis: Limited individual heterogeneity and extensive population polymorphismJournal of Molecular Biology, 1977
- The arrangement of length heterogeneity in repeating units of amplified and chromosomal ribosomal DNA from Xenopus laevisJournal of Molecular Biology, 1976
- OBSERVATIONS ON EARLY GERM CELL DEVELOPMENT AND PREMEIOTIC RIBOSOMAL DNA AMPLIFICATION IN XENOPUS LAEVIS Journal of Cell Biology, 1974
- DNA of mammalian and avian heterochromatinExperimental Cell Research, 1972
- The number and activity of ribosomal RNA genes in Xenopus laevis embryos carrying partial deletions in both nucleolar organizersBiochemical Genetics, 1972
- Reduction of ribosomal RNA synthesis and ribosomal RNA genes in a mutant of Xenopus laevis which organizes only a partial nucleolus: I. Ribosomal RNA synthesis in embryos of different nucleolar typesJournal of Molecular Biology, 1970
- Reduction of ribosomal RNA synthesis and ribosomal RNA genes in a mutant of Xenopus laevis which organizes only a partial nucleolusJournal of Molecular Biology, 1970
- Mutations affecting the Size of the Nucleolus in Xenopus laevisNature, 1970
- Chromosomal Localization of Mouse Satellite DNAScience, 1970
- Specific Gene Amplification in OocytesScience, 1968