Chromosomal localization of 18S + 28S and 5S Ribosomal RNA genes in evolutionarily diverse anuran amphibians

The chromosomal locations of the 18S + 28S and 5S ribosomal RNA genes have been analyzed by in situ hybridization in ten anuran species of different taxonomic positions. The chosen species belong to both primitive and evolved families of the present day Anura. Each examined species has 18s + 28S rRN...

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Published in:Chromosoma 1982-01, Vol.84 (4), p.475-491
Main Authors: Vitelli, L, Batistoni, R, Andronico, F, Nardi, I, Barsacchi-Pilone, G
Format: Article
Language:English
Subjects:
Animals
Anura
Anura - genetics
Biological Evolution
Chromosome Mapping
Chromosomes - ultrastructure
Genes
Karyotyping
RNA, Ribosomal - genetics
Species Specificity
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cited_by cdi_FETCH-LOGICAL-c379t-b7d75ebf1e4db96e2c62744a2b10f715565f48965422eadcf1691925961ae9373
cites cdi_FETCH-LOGICAL-c379t-b7d75ebf1e4db96e2c62744a2b10f715565f48965422eadcf1691925961ae9373
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container_title Chromosoma
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creator Vitelli, L
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Andronico, F
Nardi, I
Barsacchi-Pilone, G
description The chromosomal locations of the 18S + 28S and 5S ribosomal RNA genes have been analyzed by in situ hybridization in ten anuran species of different taxonomic positions. The chosen species belong to both primitive and evolved families of the present day Anura. Each examined species has 18s + 28S rRNA genes clustered in one locus per haploid chromosome set: this locus is placed either in an intercalary position or proximal to the centromere, or close to the telomere. The 5S rRNA genes are arranged in clusters which vary in number from one to six per haploid set. The 5S rDNA sites are found in intercalary positions, at the telomeres, and at, or close to, the centromeres. Microchromosomes and small chromosomes in primitive karyotypes have been found to carry 5S rDNA sequences. The results are discussed in relation to ideas on the karyological evolution of Amphibia.
doi_str_mv 10.1007/bf00292849
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ispartof Chromosoma, 1982-01, Vol.84 (4), p.475-491
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1432-0886
language eng
recordid cdi_proquest_miscellaneous_74031978
source Springer Online Journal Archives (Through 1996)
subjects Animals
Anura
Anura - genetics
Biological Evolution
Chromosome Mapping
Chromosomes - ultrastructure
Genes
Karyotyping
RNA, Ribosomal - genetics
Species Specificity
title Chromosomal localization of 18S + 28S and 5S Ribosomal RNA genes in evolutionarily diverse anuran amphibians
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