Nom du corpus

Corpus Systématique Animale

Titre du document

Satellite DNAs, Heterochromatin and sex chromosomes in Chionodraco hamatus (Channichthyidae, Perciformes)

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Poissons_v2b_003308
Auteur(s)
  • T. Capriglione 1
  • A. Morescalchi 2
  • E. Olmo 3
  • L. Rocco 1
  • V. Stingo 1
  • S. Manzo 1
Affiliation(s)
  • 1) Dipartimento di Biologia Evolutiva e Comparata, Via Mezzocannone 8, I-80134, Napoli, Italy
  • 2) Istituto di Anatomia Comparata, Viale Benedetto XV, 5, I-16132, Genova, Italy
  • 3) Istituto di Biologia e Genetica, Via delle Brecce Bianche, 1-60100, Ancona, Italy
Résumé

We studied the genome of an antarctic ice fish, Chionodraco hamatus, in order to detect highly repetitive DNAs that may play a role in heterochromatinization processes and sex chromosome differentiation. We used two different experimental approaches. Hybridization of a Bkm probe to genomic DNA showed slight differences between the two sexes. Using restriction enzymes, a Bgl II satellite (pIF) was isolated. In situ hybridization revealed a preferential localization of pIF on the centromeres and the telomeres of most chromosomes, as well as an interstitial band on the long arms of the neo-Y sex chromosome, where probably the hypothetical fusion took place. Dot-blot experiments showed that pIF is still present in species belonging to different families of the same suborder. Though preliminary, our results suggest a conservative nature of this DNA which might have played a definite functional role in the genome of these polar fishes.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - psychologie. psychophysiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - General Agricultural and Biological Sciences
Catégories WoS
  • 1 - science ; 2 - ecology
  • 1 - science ; 2 - biodiversity conservation
Identifiant ISTEX
B2CA3E8E7C33625FBF5EEAB54F8B2D750A50BDE8
Revue

Polar Biology

Année de publication
1994
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
6.195
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-1JT8M9BT-P
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