Nom du corpus

Corpus Systématique Animale

Titre du document

Unusual chromosome complement in the brooding bivalve Lasaea consanguinea

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Mollusques_v2b_00426
Auteur(s)
  • C. Thiriot-Quiévreux 1
  • F. Soyer 2
  • F. de Bovée 2
  • P. Albert 2
Affiliation(s)
  • 1) Station Zoologique, CEROV, 06230, Villefranche-sur-Mer, France
  • 2) Laboratoire Arago, Université P. et M. Curie, UA 117, 66650, Banyuls-sur-Mer, France
Résumé

Chromosomes of the brooding species Lasaea consanguinea were studied as part of a general invertigation of evolutionary genetics of antarctic bivalve species. Laseid species are of particular interest because they are widely distributed geographically, they inhabit the high intertidal zone, and they may reproduce apomictically. The diploid number of chromosomes for Lasaea consanguinea ranges from 100 to 120, 110 to 112 being most frequent. Karyological data (2n=108) show 6 groups of chromosomes. Group I includes 8 metacentric (m), 3 submetacentric (sm), 2 subtelocentric (st) and 4 telocentric (t) pairs. Group II has 11 t to st pairs; group III, 9 sm to m pairs; group IV, 8 m to sm pairs; group V, 6 st and group VI, 3 m pairs. Within each of the Groups II to VI chromosome pairs are of about the same size and morphology. The chromosomes of Lasaea consanguinea are unusual because of their abundance, their large size and their numerical variability. We suggest that Lasaea consanguinea has had a hermaphroditic ancestor where abnormal reproduction such as inbreeding, lack of males, and apomixy gave rise to genetic instability, the high number of chromosomes being related to the genetic instability with evolutionary polyploidy or/and supernumerary chromosomes.

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 - genetique des eucaryotes. evolution biologique et moleculaire
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
43BF3EB84D7D8867D0F72787610BFFE2B4CD3D02
Revue

Genetica

Année de publication
1988
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
7.549
Sous-corpus
  • Mollusques
Type de publication
Journal
ark:/67375/1BB-GQXXBM2H-4
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