Comparative genomics of Bistorta vivipara
" High Northern latitudes are predicted to change considerably in forthcoming climate scenarios, and empirical evidence detailing a species' capacity to cope with extreme variability is needed. Tundra plants make for an excellent study because their genetic histories were impacted by the d...
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ftdatacite:10.25710/jfmx-9k53 2023-05-15T15:08:23+02:00 Comparative genomics of Bistorta vivipara Bronny, Daniel F. 2011 https://dx.doi.org/10.25710/jfmx-9k53 https://cedar.wwu.edu/wwuet/178 unknown Western Washington University Text Masters Thesis article-journal ScholarlyArticle 2011 ftdatacite https://doi.org/10.25710/jfmx-9k53 2021-11-05T12:55:41Z " High Northern latitudes are predicted to change considerably in forthcoming climate scenarios, and empirical evidence detailing a species' capacity to cope with extreme variability is needed. Tundra plants make for an excellent study because their genetic histories were impacted by the dramatic transitions of historic glacial and interglacial ages. Here, thousands of restriction site-associated DNA (RAD) markers from geographically isolated Alaskan (Arctic) and Coloradan (Alpine) Bistorta vivipara (Polygonaceae) populations are compared in an investigation of evolutionary response to rapid climate change. Non-coding nuclear markers were analyzed in a coalescent framework to estimate an effective ancestral population size (Na) and divergence date (t) of the two populations of ~23 000 individuals and ~140 000 years before present. Nucleotide substitutions per synonymous site (dS) and nonsynonymous site (dN) were calculated for putative orthologous protein-coding sequences to determine the form of selection acting on the subsampled genome in the context of t. Most sequences were either 100% conserved or exhibited dS > dN, suggesting purifying selection. The few sequences suggesting positive selection (dS < dN) were identified as retroelements, which are expected to escape purifying selection. There were two exceptions: a putative protein phosphatase and a kinase involved with steroid signaling. The results suggest genetic adaptation is not a readily apparent option for B. vivipara’s response to climate change. This, and other organisms whose habitats will shift quickly or disappear, may depend on demographic and plastic responses as alternatives to extinction. " Text Arctic Climate change Tundra DataCite Metadata Store (German National Library of Science and Technology) Arctic |
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" High Northern latitudes are predicted to change considerably in forthcoming climate scenarios, and empirical evidence detailing a species' capacity to cope with extreme variability is needed. Tundra plants make for an excellent study because their genetic histories were impacted by the dramatic transitions of historic glacial and interglacial ages. Here, thousands of restriction site-associated DNA (RAD) markers from geographically isolated Alaskan (Arctic) and Coloradan (Alpine) Bistorta vivipara (Polygonaceae) populations are compared in an investigation of evolutionary response to rapid climate change. Non-coding nuclear markers were analyzed in a coalescent framework to estimate an effective ancestral population size (Na) and divergence date (t) of the two populations of ~23 000 individuals and ~140 000 years before present. Nucleotide substitutions per synonymous site (dS) and nonsynonymous site (dN) were calculated for putative orthologous protein-coding sequences to determine the form of selection acting on the subsampled genome in the context of t. Most sequences were either 100% conserved or exhibited dS > dN, suggesting purifying selection. The few sequences suggesting positive selection (dS < dN) were identified as retroelements, which are expected to escape purifying selection. There were two exceptions: a putative protein phosphatase and a kinase involved with steroid signaling. The results suggest genetic adaptation is not a readily apparent option for B. vivipara’s response to climate change. This, and other organisms whose habitats will shift quickly or disappear, may depend on demographic and plastic responses as alternatives to extinction. " |
format |
Text |
author |
Bronny, Daniel F. |
spellingShingle |
Bronny, Daniel F. Comparative genomics of Bistorta vivipara |
author_facet |
Bronny, Daniel F. |
author_sort |
Bronny, Daniel F. |
title |
Comparative genomics of Bistorta vivipara |
title_short |
Comparative genomics of Bistorta vivipara |
title_full |
Comparative genomics of Bistorta vivipara |
title_fullStr |
Comparative genomics of Bistorta vivipara |
title_full_unstemmed |
Comparative genomics of Bistorta vivipara |
title_sort |
comparative genomics of bistorta vivipara |
publisher |
Western Washington University |
publishDate |
2011 |
url |
https://dx.doi.org/10.25710/jfmx-9k53 https://cedar.wwu.edu/wwuet/178 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_doi |
https://doi.org/10.25710/jfmx-9k53 |
_version_ |
1766339763710722048 |