Nom du corpus

Corpus Systématique Animale

Titre du document

Genome structure and divergence of nucleotide sequences in echinodermata

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Echinodermes_v2b_0176
Auteur(s)
  • Vl. A. Brykov 1
  • V. G. Volfson 2
  • V. I. Vorob'ev 2
Affiliation(s)
  • 1) Institute of Marine Biology of the Far East Scientific Centre of the Academy of Sciences of the USSR, 690022, Vladivostok, USSR
  • 2) Institute of Cytology of the Academy of Sciences of the USSR, Ave. Maklina 32, 190121, Leningrad, USSR
Résumé

The arrangement of repetitive and single-copy DNA sequences has been studied in DNA of some species of Echinodermata — sea urchin, starfishes and sea-cucumber. Comparison of the reassociation kinetics of short and long DNA fragments indicates that the pattern of DNA sequence organization of all these species is similar to the so called “Xenopus pattern” characteristic of the genomes of most animals and plants. However, substantional variations have been found in the amount of repetitive nucleotide sequences in DNA of different species and in the length of DNA regions containing adjacent single-copy and repetitive sequences. Measurements of the size of S1-nuclease resistant reassociated repetitive DNA sequences show a variability of ratios between long and short repetitive DNA sequences of different species. — The degree of divergence of short and long repetitive DNA sequences and single-copy DNA was studied by molecular hybridization of the sea urchin Strongylocentrotus intermedius 3H-DNA with the DNA of other species and by determination of the thermostability of the hybridized molecules so obtained. All three fractions of S. intermedius DNA contain sequences homologous to DNA of the other echinoderm species studied. The results obtained suggest that short repetitive DNA sequences are those which have been most highly conserved throughout the evolution of Echinodermata. A new hypothesis is proposed to explain the nature of the evolutionary changes in DNA sequence interspersion patterns.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - developmental biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Health Sciences ; 2 - Medicine ; 3 - Genetics(clinical)
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
  • 1 - science ; 2 - biochemistry & molecular biology
Identifiant ISTEX
069C0713CB8738852513D25FF7584759B846E18C
Revue

Chromosoma

Année de publication
1979
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.7
Sous-corpus
  • Echinodermes
Type de publication
Journal
ark:/67375/1BB-6BSFDRFM-M
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