Nom du corpus

Corpus Systématique Animale

Titre du document

Genetic variability and divergence between populations and species of Nesticus cave spiders

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Arthropodes_v2b_00823
Auteur(s)
  • D. Cesaroni 1
  • G. Allegrucci 1
  • A. Caccone 1
  • M. Cobolli Sbordoni 1
  • E. De Matthaeis 1
  • M. Di Rao 1
  • V. Sbordoni 1
Affiliation(s)
  • 1) Institute of Zoology, University of Rome, Rome, Italy
Résumé

Genetic variability and divergence at 21 enzyme loci were studied in and between Italian populations of the cave spiders Nesticus eremita (13 populations), N. menozzii and N. sbordonii (one population each). The three species differ with respect to the degree of specialization to cave life, dispersion ability, isolation of populations, abundancy, extent of the distribution area, and range from the troglophilic and widespread N. eremita to the troglobitic N. sbordonii, endemic to a single cave in the Central Appennines. Heterozygosity ranges from 0.05 to 0.15 in N. eremita populations and appears to be largely controlled by the occurrence and the extent of gene flow among populations. The relatively low polymorphism levels of N. menozzii (H=0.081) and N. sbordonii (H=0.106) are also associated with reduced gene flow and small population sizes. Genetic distances between N. eremita populations vary considerably and are strictly related to the geographical distances involved, again indicating a major role of gene flow in determining the patterns of genetic differentiation between populations. This view is strongly supported by the results of a principal component analysis applied to the gene-frequency data. Estimates of genetic divergence between species suggest that the major cladogenetic events leading to complete separation of these three Nesticus species occurred in the Middle-late Pliocene.

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 - invertebres
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
A146EAA067D210E4328C97D82AEA9EB52123CE7E
Revue

Genetica

Année de publication
1981
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.647
Sous-corpus
  • Arthropodes
Type de publication
Journal
ark:/67375/1BB-62CW9HKC-H
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