Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Microspatial genetic structure in the land snail Helix aspersa (Gastropoda: Helicidae)
Autore:
Arnaud, JF; Madec, L; Bellido, A; Guiller, A;
Indirizzi:
Univ Rennes 1, Serv Zool & Ecophysiol, CNRS, UMR 6553, F-35042 Rennes, France Univ Rennes 1 Rennes France F-35042 RS, UMR 6553, F-35042 Rennes, France Stn Biol Paimpont, Serv Ecol Sol & Biol Populat, CNRS, UMR 6553, F-35380 Plelan Le Grand, France Stn Biol Paimpont Plelan Le Grand France F-35380 Plelan Le Grand, France Univ Rennes 1, Serv Parasitol Pharmaceut, CNRS, UMR 6553, F-35043 Rennes, France Univ Rennes 1 Rennes France F-35043 RS, UMR 6553, F-35043 Rennes, France
Titolo Testata:
HEREDITY
, volume: 83, anno: 1999,
parte:, 2
pagine: 110 - 119
SICI:
0018-067X(199908)83:<110:MGSITL>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL-AUTOCORRELATION ANALYSIS; AUTO-CORRELATION ANALYSIS; POPULATION-STRUCTURE; DISTANCE; PULMONATA; FLOW; DIFFERENTIATION; STATISTICS; PATTERNS; BIOLOGY;
Keywords:
allozymes; F-statistics; genetic structure; land snail; metapopulation; spatial autocorrelation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Arnaud, JF Univ Rennes 1, Serv Zool & Ecophysiol, CNRS, UMR 6553, Campus de Beauliue,Ave Ga Leclerc, F-35042 Rennes, France Univ Rennes 1 Campus de Beauliue,Ave Ga Leclerc Rennes France F-35042
Citazione:
J.F. Arnaud et al., "Microspatial genetic structure in the land snail Helix aspersa (Gastropoda: Helicidae)", HEREDITY, 83, 1999, pp. 110-119

Abstract

The microspatial genetic structure of allele frequencies at seven isozyme loci was examined for 15 populations of the land snail Helix aspersa sa sampled in a village from Brittany (north-western France). Spatial heterogeneity of allele frequencies was highly significant (P < 0.001). Fixation indices reflected nonrandom mating within neighbourhoods and a slight but consistent differentiation between colonies (F-ST = 0.044; P < 0.01). Analyses ofgene flow or genetic distances failed to reveal a significant relationshipwith geographical distance, probably because of the complexity of environmental heterogeneity. However, matrix comparisons between genetic distances and connectivity networks among adjacent colonies (Gabriel-connected graph)yielded a significant correlation in every case, indicating a 'step-by-step' relationship between neighbouring localities. Moreover, most of the allozymes were spatially structured and showed (i) a gradual isolation of colonies with increasing geographical distances, and (ii), for some correlogram profiles, a circular gradient illustrating a multidirectional colonization of the village. The probable existence of disperser individuals allowed us to suggest a metapopulation model which would explain the maintenance of such animals in fragmented habitats where anthropogenic disturbances and extinction/recolonization events are commonly observed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 17:05:28