Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum
The Fennoscandian flora is characterized by a high frequency of polyploids, probably because they were more successful than diploid plants in colonizing after the last Ice Age. The first postglacial colonizers were likely poor competitors and became displaced from the lowlands as forests advanced. C...
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ftslunivuppsala:oai:pub.epsilon.slu.se:847 2024-06-09T07:44:28+00:00 Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum Nyberg Berglund, Anna-Britt 2005 application/pdf https://pub.epsilon.slu.se/847/ https://pub.epsilon.slu.se/847/1/ABNBfin0_reviderad_050509.pdf eng eng https://pub.epsilon.slu.se/847/1/ABNBfin0_reviderad_050509.pdf Nyberg Berglund, Anna-Britt (2005). Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2005:65 ISBN 91-576-6964-3 [Doctoral thesis] Not in use please see Agris categories Doctoral thesis NonPeerReviewed info:eu-repo/semantics/doctoralThesis 2005 ftslunivuppsala 2024-05-16T04:04:25Z The Fennoscandian flora is characterized by a high frequency of polyploids, probably because they were more successful than diploid plants in colonizing after the last Ice Age. The first postglacial colonizers were likely poor competitors and became displaced from the lowlands as forests advanced. Consequently, many of these pioneers are currently found only above tree line. However, some have persisted within the forests on open habitats such as naturally toxic serpentine soils where succession is arrested at the pioneer stage. These populations represent relicts of former widely distributed plants. The polyploid Cerastium alpinum L. (Caryophyllaceae) grows on serpentine soils throughout Fennoscandia. C. alpinum populations on different soil types provide a model system for the study of the early postglacial colonization history of Fennoscandia. Genetic markers showed that C. alpinum populations in western Fennoscandia differ genetically from eastern populations, suggesting a two-way colonization. The two lineages meet in a hybrid zone in Northern Scandinavia where a high degree of genetic variation was found. Plants from Fennoscandia and the Western Arctic (Canada, Greenland and Iceland) shared many AFLP fragments, which suggests they originate from common refugia. The Fennoscandian populations were more distantly related to the populations in potential refugia in southern Europe. In fact, the northern populations contained AFLP fragments not found in populations in the Pyrenees and the Alps. Lack of chloroplast DNA variation indicates fast postglacial range expansions and/or a recent origin of C. alpinum. Crosses were made to establish the inheritance of enzyme markers. The results strengthen the evidence for an allopolyploid origin of C. alpinum. Adjacent serpentine and non-serpentine populations of C. alpinum provide a model system of natural replicates to test whether adaptation to serpentine is constitutive (common for all populations) or locally evolved. A growth experiment with high concentrations of ... Doctoral or Postdoctoral Thesis Arctic Fennoscandia Fennoscandian Greenland Iceland Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive Arctic Canada Greenland |
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Open Polar |
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Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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English |
topic |
Not in use please see Agris categories |
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Not in use please see Agris categories Nyberg Berglund, Anna-Britt Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum |
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Not in use please see Agris categories |
description |
The Fennoscandian flora is characterized by a high frequency of polyploids, probably because they were more successful than diploid plants in colonizing after the last Ice Age. The first postglacial colonizers were likely poor competitors and became displaced from the lowlands as forests advanced. Consequently, many of these pioneers are currently found only above tree line. However, some have persisted within the forests on open habitats such as naturally toxic serpentine soils where succession is arrested at the pioneer stage. These populations represent relicts of former widely distributed plants. The polyploid Cerastium alpinum L. (Caryophyllaceae) grows on serpentine soils throughout Fennoscandia. C. alpinum populations on different soil types provide a model system for the study of the early postglacial colonization history of Fennoscandia. Genetic markers showed that C. alpinum populations in western Fennoscandia differ genetically from eastern populations, suggesting a two-way colonization. The two lineages meet in a hybrid zone in Northern Scandinavia where a high degree of genetic variation was found. Plants from Fennoscandia and the Western Arctic (Canada, Greenland and Iceland) shared many AFLP fragments, which suggests they originate from common refugia. The Fennoscandian populations were more distantly related to the populations in potential refugia in southern Europe. In fact, the northern populations contained AFLP fragments not found in populations in the Pyrenees and the Alps. Lack of chloroplast DNA variation indicates fast postglacial range expansions and/or a recent origin of C. alpinum. Crosses were made to establish the inheritance of enzyme markers. The results strengthen the evidence for an allopolyploid origin of C. alpinum. Adjacent serpentine and non-serpentine populations of C. alpinum provide a model system of natural replicates to test whether adaptation to serpentine is constitutive (common for all populations) or locally evolved. A growth experiment with high concentrations of ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Nyberg Berglund, Anna-Britt |
author_facet |
Nyberg Berglund, Anna-Britt |
author_sort |
Nyberg Berglund, Anna-Britt |
title |
Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum |
title_short |
Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum |
title_full |
Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum |
title_fullStr |
Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum |
title_full_unstemmed |
Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum |
title_sort |
postglacial colonization and parallel evolution of metal tolerance in the polyploid cerastium alpinum |
publishDate |
2005 |
url |
https://pub.epsilon.slu.se/847/ https://pub.epsilon.slu.se/847/1/ABNBfin0_reviderad_050509.pdf |
geographic |
Arctic Canada Greenland |
geographic_facet |
Arctic Canada Greenland |
genre |
Arctic Fennoscandia Fennoscandian Greenland Iceland |
genre_facet |
Arctic Fennoscandia Fennoscandian Greenland Iceland |
op_relation |
https://pub.epsilon.slu.se/847/1/ABNBfin0_reviderad_050509.pdf Nyberg Berglund, Anna-Britt (2005). Postglacial colonization and parallel evolution of metal tolerance in the polyploid Cerastium alpinum. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2005:65 ISBN 91-576-6964-3 [Doctoral thesis] |
_version_ |
1801373212097904640 |