Nom du corpus

Corpus Systématique Animale

Titre du document

Chromosome and C-heterochromatin polymorphisms in the Italian newt, Triturus italicus

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Batraciens_v2b_00032
Auteur(s)
  • Stefania Bucci-Innocenti 1
  • Matilde Ragghianti 1
  • Giorgio Mancino 1
Affiliation(s)
  • 1) Institute of Histology and Embryology, University of Pisa, Pisa, Italy
Résumé

A combined chromosome and C-heterochromatin polymorphism in pair 12 in the complement of the newt species, T. italicus is described. The C-heterochromatin polymorphism is presumably due to a loss in the proximal C-band, whereas the chromosomal polymorphism has its origin in two different independent pericentric inversions both including the centromere and the proximal C-band of chromosome 12. The double-inversion polymorphism has a wide distribution over the range and follows a clear bipolarity between a northern area where the karyotype is homomorphic for the standard type of pair 12 (ST/ST) and an opposite area where the ST type is completely replaced by variant M1 and M2 metacentric chromosomes 12. Various karyophylogenies are possible, but the simplest and the most probable presumes an ancestral karyotype of ST/ST and a mechanism of gradual replacement of the heterobrachial chromosome ST by two independent pericentric inversions. The present data are discussed in relation to existing theories on karyological evolution of Urodeles and the functional significance of telocentric chromosomes suggested by Sessions et al. (1982).

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
  • 4 - genetique des eucaryotes. evolution biologique et moleculaire
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
917F7089EE97C81527308E177DF69DB2EFB0BE8B
Revue

Chromosoma

Année de publication
1983
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.991
Sous-corpus
  • Batraciens
Type de publication
Journal
ark:/67375/1BB-233ZB00K-M
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