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Population Genetics and Speciation in the Plant Genus Silene (section Elisanthe)

Harper, Andrea Louise (2010)
Ph.D. thesis, University of Birmingham.

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Abstract

This thesis is concerned with speciation and population genetics in the plant genus Silene (section Elisanthe). The introductory chapter is a literature review covering characteristics of the species studied, and the current literature on their evolutionary dynamics and population genetics. The second and third chapters cover techniques used in all experiments, such as DNA extraction, sequencing and genotyping protocols, and explain the rationale behind the initial experimental design. The fourth chapter focuses on the multi-locus analysis of autosomal gene sequences from S. latifolia and S. dioica. The relationship between the two species was investigated using various analyses such as isolation modeling and admixture analysis providing estimates of evolutionary distance and extent of historical gene flow. The maintenance of the species despite frequent hybridization at present-day hybrid zones is discussed. The fifth chapter discusses S. diclinis, a rare endemic found only in Valencia, Spain. The nature of population structuring and the evolutionary history of this species were investigated using a multilocus approach incorporating individuals from S. diclinis populations. The causes of the restricted distribution and low population size of this species is discussed The concluding chapter discusses how the species evolved from a common ancestor amidst changing climatic and environmental conditions.

Type of Work:Ph.D. thesis.
Supervisor(s):Armstrong, Susan J. and Filatov, Dmitry A.
School/Faculty:Colleges (2008 onwards) > College of Life & Environmental Sciences
Department:Department of Molecular and Cell Biology
Subjects:QH426 Genetics
QH301 Biology
Institution:University of Birmingham
ID Code:435
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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