Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains
Climate change during the Quaternary played an important role in the differentiation and evolution of plants. A prevailing hypothesis is that alpine and arctic species survived glacial periods in refugia at the periphery of glaciers. Though the Rocky Mountains, south of the southernmost extent of co...
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crwiley:10.3732/ajb.92.3.477 2024-06-23T07:50:31+00:00 Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains DeChaine, Eric G. Martin, Andrew P. University of Colorado 2005 http://dx.doi.org/10.3732/ajb.92.3.477 https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.92.3.477 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 92, issue 3, page 477-486 ISSN 0002-9122 1537-2197 journal-article 2005 crwiley https://doi.org/10.3732/ajb.92.3.477 2024-05-31T08:13:43Z Climate change during the Quaternary played an important role in the differentiation and evolution of plants. A prevailing hypothesis is that alpine and arctic species survived glacial periods in refugia at the periphery of glaciers. Though the Rocky Mountains, south of the southernmost extent of continental ice, served as an important glacial refuge, little is known about how climate cycles influenced populations within this region. We inferred the phylogeography of Sedum lanceolatum (Crassulaceae) within the Rocky Mountain refugium to assess how this high‐elevation plant responded to glacial cycles. We sequenced 884 base pairs (bp) of cpDNA intergenic spacers (tRNA‐L to tRNA‐F and tRNA‐S to tRNA‐G) for 333 individuals from 18 alpine populations. Our highly variable markers allowed us to infer that populations persisted across the latitudinal range throughout the climate cycles, exhibited significant genetic structure, and experienced cycles of range expansion and fragmentation. Genetic differentiation in S. lanceolatum was most likely a product of short‐distance elevational migration in response to climate change, low seed dispersal, and vegetative reproduction. To the extent that Sedum is a good model system, paleoclimatic cycles were probably a major factor preserving genetic variation and promoting divergence in high‐elevation flora of the Rocky Mountains. Article in Journal/Newspaper Arctic Climate change Wiley Online Library Arctic American Journal of Botany 92 3 477 486 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Climate change during the Quaternary played an important role in the differentiation and evolution of plants. A prevailing hypothesis is that alpine and arctic species survived glacial periods in refugia at the periphery of glaciers. Though the Rocky Mountains, south of the southernmost extent of continental ice, served as an important glacial refuge, little is known about how climate cycles influenced populations within this region. We inferred the phylogeography of Sedum lanceolatum (Crassulaceae) within the Rocky Mountain refugium to assess how this high‐elevation plant responded to glacial cycles. We sequenced 884 base pairs (bp) of cpDNA intergenic spacers (tRNA‐L to tRNA‐F and tRNA‐S to tRNA‐G) for 333 individuals from 18 alpine populations. Our highly variable markers allowed us to infer that populations persisted across the latitudinal range throughout the climate cycles, exhibited significant genetic structure, and experienced cycles of range expansion and fragmentation. Genetic differentiation in S. lanceolatum was most likely a product of short‐distance elevational migration in response to climate change, low seed dispersal, and vegetative reproduction. To the extent that Sedum is a good model system, paleoclimatic cycles were probably a major factor preserving genetic variation and promoting divergence in high‐elevation flora of the Rocky Mountains. |
author2 |
University of Colorado |
format |
Article in Journal/Newspaper |
author |
DeChaine, Eric G. Martin, Andrew P. |
spellingShingle |
DeChaine, Eric G. Martin, Andrew P. Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains |
author_facet |
DeChaine, Eric G. Martin, Andrew P. |
author_sort |
DeChaine, Eric G. |
title |
Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains |
title_short |
Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains |
title_full |
Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains |
title_fullStr |
Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains |
title_full_unstemmed |
Marked genetic divergence among sky island populations of Sedum lanceolatum(Crassulaceae) in the Rocky Mountains |
title_sort |
marked genetic divergence among sky island populations of sedum lanceolatum(crassulaceae) in the rocky mountains |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.3732/ajb.92.3.477 https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.92.3.477 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
American Journal of Botany volume 92, issue 3, page 477-486 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.92.3.477 |
container_title |
American Journal of Botany |
container_volume |
92 |
container_issue |
3 |
container_start_page |
477 |
op_container_end_page |
486 |
_version_ |
1802641421661896704 |