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Patterns of genetic differentiation and gene flow in Central Italian populations of Dinocras cephalotes (Curtis, 1827) (Insecta, Plecoptera)

TitoloPatterns of genetic differentiation and gene flow in Central Italian populations of Dinocras cephalotes (Curtis, 1827) (Insecta, Plecoptera)
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2001
AutoriKetmaier, Valerio, Fochetti R., Iannilli Valentina, and De Matthaeis E.
RivistaArchiv fur Hydrobiologie
Volume150
Paginazione457 - 472
Data di pubblicazione2001///
Parole chiaveAllozymes, Dinocras, Gene flow, Perla, Stonefly
Abstract

Dispersal is a crucial phenomenon which has a strong influence on the ecology and evolution of species, determining the extent of gene flow among conspecific populations. In this paper, we present data on the degree of genetic structuring in 11 populations of the stonefly Dinocras cephalotes, focusing our attention on three Central Italian rivers: Aniene, Nera and Velino. We studied the genetic variation at 28 enzymatic loci by means of starch gel electrophoresis: 19 loci were polymorphic in one population at least. The degree of genetic structuring and levels of gene flow were estimated by F-statistics using Weir & Cockerham’s estimators. Relatively high levels of genetic differentiation were revealed, considerably higher than those obtained in other studies of stonefly species. Neighbour-joining analysis provided a geographic scheme of relationships of the study populations, grouping them according to the river of origin. This analysis was supported by bootstrap values. We were not able to detect an unequivocal relationship between gene flow and geographic distances between sites within each river; this led us to hypothesise that equilibrium has not been reached between genetic drift and gene flow.

Note

Cited By (since 1996): 5Export Date: 26 August 2010Source: Scopus

URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0035112025&partnerID=40&md5=4fbf4d80d43ff4b3c219b6525adaf735
Citation Key531