Nom du corpus

Corpus Systématique Animale

Titre du document

Chromosomal repatterning in crocodiles: C, G and N-banding and the in situ hybridization of 18S and 26S rRNA cistrons

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Reptiles_v2b_00319
Auteur(s)
  • M. King 1
  • R. Honeycutt 2
  • N. Contreras 3
Affiliation(s)
  • 1) Division of Natural Sciences, Museum of Arts and Sciences of the Northern Territory, P.O. Box 4646, Darwin, N.T., Australia
  • 2) Department of Organismic and Evolutionary Biology, Harvard University, 02138, Cambridge, Massachusetts, U.S.A.
  • 3) Department of Population Biology, Research School of Biological Sciences, Australian National University, Canberra, A.C.T., Australia
Résumé

The chromosomes of Crocodylus porosus, C. johnstoni and Caiman crocodilus have been analysed using C, G and N-banding techniques and the in situ hybridization of 18S+26S rRNA cistrons derived from Xenopus. It is clear that in addition to the gross structural changes (robertsonian rearrangements and pericentric inversions) which are known to distinguish these crocodiles, numerous other modes of repatterning have occurred. These involved both the heterochromatic and euchromatic portions of the genome. They appear to be associated with the gross structural changes which have been established, and involve two distinct forms of chromatin transformation. In addition, the in situ hybridization of 18S+26S rRNA cistrons onto these crocodilian chromosomes has localized the site of nucleolus organizer activity to the C-band positive G-band negative secondary constrictions present in all three species. The significance of these results is discussed.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - evolutionary biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - microbiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Insect Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Plant Science
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Animal Science and Zoology
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
Identifiant ISTEX
213C5920F1BAA27B1755ABE1F17E114368628F85
Revue

Genetica

Année de publication
1986
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.016
Sous-corpus
  • Reptiles
Type de publication
Journal
ark:/67375/1BB-3G1VVN9M-H
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