Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/8748
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Cirsium species show disparity in patterns of genetic variation at their range-edge, despite similar patterns of reproduction and isolation
Authors: Jump, Alistair
Woodward, F Ian
Burke, Terry
Contact Email: a.s.jump@stir.ac.uk
Keywords: Cirsium
microsatellites
geographical range
genetic variation
isolation by distance
clonal reproduction
Issue Date: Nov-2003
Publisher: Wiley-Blackwell
Citation: Jump A, Woodward FI & Burke T (2003) Cirsium species show disparity in patterns of genetic variation at their range-edge, despite similar patterns of reproduction and isolation, New Phytologist, 160 (2), pp. 359-370.
Abstract: • Genetic variation was assessed across the UK geographical range of Cirsium acaule and Cirsium heterophyllum. A decline in genetic diversity and increase in population divergence approaching the range edge of these species was predicted based on parallel declines in population density and seed production reported seperately. Patterns were compared with UK populations of the widespread Cirsium arvense. • Populations were sampled along a latitudinal transect in the UK and genetic variation assessed using microsatellite markers. • Cirsium acaule shows strong isolation by distance, a significant decline in diversity and an increase in divergence among range-edge populations. Geographical structure is also evident in C. arvense, whereas no such patterns are seen in C. heterophyllum. • There is a major disparity between patterns of genetic variation in C. acaule and C. heterophyllum despite very similar patterns in seed production and population isolation in these species. This suggests it may be misleading to make assumptions about the geographical structure of genetic variation within species based solely on the present-day reproduction and distribution of populations.
Type: Journal Article
URI: http://hdl.handle.net/1893/8748
DOI Link: http://dx.doi.org/10.1046/j.1469-8137.2003.00874.x
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Biological and Environmental Sciences
University of Sheffield
University of Sheffield

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