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PMID: 598264 Published · ppublish English Journal Article

Chromosome location of the ribosomal RNA genes in Triturus vulgaris meridionalis (Amphibia, Urodela). II. Intraspecific variability in number and position of the chromosome loci for 18S + 28S ribosomal RNA.

Chromosoma ·Vol. 64 ·No. 1 ·1977-11-03 ·Pages 67-84

Nardi I, Barsacchi-Pilone G, Batistoni R, Andronico F

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.

MeSH Terms
Animals Chromosomes/analysis Female Genes Karyotyping Male Meiosis Mitosis RNA, Ribosomal/genetics Triturus/genetics
Chemicals
RNA, Ribosomal
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Nardi I
Barsacchi-Pilone G
Batistoni R
Andronico F
References (21)
21 references, click to expand
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Article Info
Journal
Chromosoma
Abbr.
Chromosoma
ISSN
0009-5915
DOI
10.1007/BF00292889
Published
1977-11-03
Pages
67-84
Language
English
Region
Austria
NLM ID
2985138R
Subset
IM
External Links
PubMed source DOI: 10.1007/BF00292889 View journal details
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