Genetic structuring and gene flow in Cerastoderma glaucum (Bivalvia: Cardiidae): evidence from allozyme variation at different geographic scales

Autor:	Stefano Mariani, E. De Matthaeis, Valerio Ketmaier
Rok vydání:	2002
Předmět:	education.field_of_study Genetic diversity Ecology biology Population Population genetics Aquatic Science biology.organism_classification Genetic structure Genetic variation Spatial variability Genetic variability education Cerastoderma glaucum Ecology Evolution Behavior and Systematics
Zdroj:	Marine Biology. 140:687-697
ISSN:	1432-1793 0025-3162
Popis:	Genetic variation at 16 enzyme loci was analysed in 20 Mediterranean and 1 Baltic population of Cerastoderma glaucum. Spatial genetic variation at different geographic scales was investigated. In general, this species was fairly genetically structured (over all loci θ=0.088), according to the fragmentary nature of its habitat. Spatial structuring of genetic diversity was shown to follow different models, depending on the geographic scale considered: a stepping-stone model provided a good fit at a wide scale, with gene flow inversely related to geographic distance, whereas at small scale, genetic relationships among samples could not be interpreted as simply the effect of physical distance among populations. Results are discussed taking into account the intrinsic and extrinsic factors which are most likely to affect the patterns of genetic structuring in coastal marine animals. Electronic supplementary material to this paper can be obtained by using the Springer LINK server located at http://dx.doi.org/10.1007/s00227-001-0753-x
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::849e0f1b5b05a981e3c69b4c9d42a807 https://doi.org/10.1007/s00227-001-0753-x Zobrazit plný text záznamu Full text from SpringerLink