Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history
Large-scale patterns of genetic variation in chloroplast (cp) and nuclear DNA in the widespread European herb species Silene latifolia and S. dioica were investigated using cpPCR-RFLPs, non-coding cpDNA sequences, AFLPs and sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA...
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Louise Hathaway, Section of Plant Ecology and Systematics, Department of Ecology, Lund University
2007
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ftulundlup:oai:lup.lub.lu.se:9a6cade7-f9c8-4533-9257-5838e2d14141 2023-05-15T16:12:19+02:00 Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history Hathaway, Louise 2007 https://lup.lub.lu.se/record/548918 eng eng Louise Hathaway, Section of Plant Ecology and Systematics, Department of Ecology, Lund University https://lup.lub.lu.se/record/548918 urn:isbn:978-91-7105-264-3 Ecology chemotaxonomy. Physiology of nonvascular plants phytogeography morphology outbreeding depression Systematic botany taxonomy ITS fitnes inbreeding depression AFLP PCR-RFLP cpDNA gene flow postglacial migration geographic variation hybridization Silene latifolia Silene section Elisanthe Silene dioica Systematisk botanik taxonomi morfologi kemotaxonomi. Växters fysiologi (inte kärlväxter) thesis/doccomp info:eu-repo/semantics/doctoralThesis text 2007 ftulundlup 2023-02-01T23:31:02Z Large-scale patterns of genetic variation in chloroplast (cp) and nuclear DNA in the widespread European herb species Silene latifolia and S. dioica were investigated using cpPCR-RFLPs, non-coding cpDNA sequences, AFLPs and sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA (rDNA). The results of the analyses of cpDNA variation using PCR-RFLPs and non-coding sequence data suggest that both S. latifolia and S. dioica colonized C and N Europe during the current postglacial period from several source/refugial regions in southern Europe, and that populations of both species spreading from the same source/refugial region had the same cpDNA. Repeated cycles of hybridization and chloroplast introgression in shared refugia and/or during the early stages of range expansion could have resulted in the homogenization of chloroplast genomes of populations of the two species that were in the same refugial region. The cpPCR-RFLP data suggest that S. dioica may also have survived the LGM in a refuge in south-eastern Europe or Russia and migrated into Fennoscandia from the north via Finland following the retreat of the Weichselian ice sheet. In contrast to results from the analysis of cpDNA, analyses of AFLP and nuclear ribosomal ITS sequences indicate differentiation between the nuclear genomes of S. latifolia and S. dioica. Both AFLPs and ITS sequences reveal limited geographic structure in C and N European populations of S. latifolia. This lack of geographic structure is most likely due to high levels of inter-population gene flow that has led to the mixing and homogenization of the nuclear genomes. European S. latifolia can be divided into western and eastern races on the basis of seed morphology. Experimental crosses did not provide any indication of reproductive barriers between the two races ? progenies from inter-racial crosses did not have lower fitness than progenies from intra-racial crosses. Experimental crosses indicated that inbreeding depression may be occurring in S. latifolia ... Doctoral or Postdoctoral Thesis Fennoscandia Ice Sheet Lund University Publications (LUP) |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology chemotaxonomy. Physiology of nonvascular plants phytogeography morphology outbreeding depression Systematic botany taxonomy ITS fitnes inbreeding depression AFLP PCR-RFLP cpDNA gene flow postglacial migration geographic variation hybridization Silene latifolia Silene section Elisanthe Silene dioica Systematisk botanik taxonomi morfologi kemotaxonomi. Växters fysiologi (inte kärlväxter) |
spellingShingle |
Ecology chemotaxonomy. Physiology of nonvascular plants phytogeography morphology outbreeding depression Systematic botany taxonomy ITS fitnes inbreeding depression AFLP PCR-RFLP cpDNA gene flow postglacial migration geographic variation hybridization Silene latifolia Silene section Elisanthe Silene dioica Systematisk botanik taxonomi morfologi kemotaxonomi. Växters fysiologi (inte kärlväxter) Hathaway, Louise Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history |
topic_facet |
Ecology chemotaxonomy. Physiology of nonvascular plants phytogeography morphology outbreeding depression Systematic botany taxonomy ITS fitnes inbreeding depression AFLP PCR-RFLP cpDNA gene flow postglacial migration geographic variation hybridization Silene latifolia Silene section Elisanthe Silene dioica Systematisk botanik taxonomi morfologi kemotaxonomi. Växters fysiologi (inte kärlväxter) |
description |
Large-scale patterns of genetic variation in chloroplast (cp) and nuclear DNA in the widespread European herb species Silene latifolia and S. dioica were investigated using cpPCR-RFLPs, non-coding cpDNA sequences, AFLPs and sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA (rDNA). The results of the analyses of cpDNA variation using PCR-RFLPs and non-coding sequence data suggest that both S. latifolia and S. dioica colonized C and N Europe during the current postglacial period from several source/refugial regions in southern Europe, and that populations of both species spreading from the same source/refugial region had the same cpDNA. Repeated cycles of hybridization and chloroplast introgression in shared refugia and/or during the early stages of range expansion could have resulted in the homogenization of chloroplast genomes of populations of the two species that were in the same refugial region. The cpPCR-RFLP data suggest that S. dioica may also have survived the LGM in a refuge in south-eastern Europe or Russia and migrated into Fennoscandia from the north via Finland following the retreat of the Weichselian ice sheet. In contrast to results from the analysis of cpDNA, analyses of AFLP and nuclear ribosomal ITS sequences indicate differentiation between the nuclear genomes of S. latifolia and S. dioica. Both AFLPs and ITS sequences reveal limited geographic structure in C and N European populations of S. latifolia. This lack of geographic structure is most likely due to high levels of inter-population gene flow that has led to the mixing and homogenization of the nuclear genomes. European S. latifolia can be divided into western and eastern races on the basis of seed morphology. Experimental crosses did not provide any indication of reproductive barriers between the two races ? progenies from inter-racial crosses did not have lower fitness than progenies from intra-racial crosses. Experimental crosses indicated that inbreeding depression may be occurring in S. latifolia ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Hathaway, Louise |
author_facet |
Hathaway, Louise |
author_sort |
Hathaway, Louise |
title |
Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history |
title_short |
Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history |
title_full |
Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history |
title_fullStr |
Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history |
title_full_unstemmed |
Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history |
title_sort |
patterns of geographic variation in silene section elisanthe (caryophyllaceae): hybridization and migrational history |
publisher |
Louise Hathaway, Section of Plant Ecology and Systematics, Department of Ecology, Lund University |
publishDate |
2007 |
url |
https://lup.lub.lu.se/record/548918 |
genre |
Fennoscandia Ice Sheet |
genre_facet |
Fennoscandia Ice Sheet |
op_relation |
https://lup.lub.lu.se/record/548918 urn:isbn:978-91-7105-264-3 |
_version_ |
1765997599752454144 |