Sharp genetic break between Atlantic and English Channel populations of the polychaete Pectinaria koreni, along the North coast of France

Article Abstract:

The enzymatic and mitochondrial genes are used to study the relative importance of historical processes and contemporary hydrodynamic features on the observed patterns of genetic structure in subdivided populations of Pectinaria koreni along the coasts of Brittany and the English Channel. It showed a deep phylogeographic break of about 16% divergence separating the Brittany and Channel populations coinciding with a biogeographic boundary along the western coast of Brittany.

France, Atlantic Ocean, Polychaeta, Polychaetes, Cytochromes, English Channel

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The role of geographic setting on the diversification process among Tephritis conura (Tephritidae) host races

Article Abstract:

A study examines the role geography plays in driving genetic divergence of the tephritid fly Tephritis conura and the relative importance of genetic drift and selection in the diversification process based on geographic distributions. Results indicate that, despite their restricted interactions in sympatry, host races are stable and the major diversification process took place before species arrived in contemporary geographical settings.

Germany, Analysis, Biological diversity, Biodiversity, Electrophoresis, Fruit-flies, Fruit flies

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Landscape genetics of alpine-snowbed plants: comparisons along geographic and snowmelt gradients

Article Abstract:

The analysis of genetic structure of the three snowbed-herb species using allozymes across nine populations arranged as a matrix of three snowmelt gradients x three geographic locations within 3 km is detailed. It was observed that restriction of gene flow due to phenological separation and possible differential selection along the snowmelt gradient produces genetic clines at microgeographic scale in the species.

Genetic research, Plant populations, Gene flow

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