Genetic structure of invading insects and the case of the knopper gallwasp

P Sunnucks, G N Stone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Genetic subdivision and small population size can have considerable evolutionary consequences, as illustrated by studies of the cynipid gallwasp Andricus quercuscalicis which has recently colonised large areas of Western Europe. Population processes associated with colonisation were investigated by allozyme analysis of 1400 wasps in 57 populations. Patterns of genetic variation showed that very severe serial genetic subsampling occurred in a westerly direction which generated diverse new genetic combinations in the invaded range. Colonisation appeared to occur with very small numbers of founders reaching suitable habitat patches, and invasion progressed in a generally linear directional 'stepping-stone' pattern with topography dictating the routes of colonisation. The genetic structure of colonising or subdivided insect populations is reviewed.

Original languageEnglish
EditorsRB Floyd, AW Sheppard, PJ DeBarro
Place of PublicationEAST MELBOURNE
PublisherRoyal Institute of Chartered Surveyors
Number of pages11
ISBN (Print)0-643-05781-1
Publication statusPublished - 1996


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