The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation
Protein, mtDNA, and nuclear microsatellite DNA analyses have demonstrated that the Yellowstone grizzly bear has low levels of genetic variability compared with other Ursus arctos populations. Researchers have attributed this difference to inbreeding during a century of anthropogenic isolation and po...
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ftpubmed:oai:pubmedcentral.nih.gov:153093 2023-05-15T18:41:48+02:00 The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation Miller, Craig R. Waits, Lisette P. 2003-04-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC153093 http://www.ncbi.nlm.nih.gov/pubmed/12655042 https://doi.org/10.1073/pnas.0735531100 en eng The National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC153093 http://www.ncbi.nlm.nih.gov/pubmed/12655042 http://dx.doi.org/10.1073/pnas.0735531100 Copyright © 2003, The National Academy of Sciences Biological Sciences Text 2003 ftpubmed https://doi.org/10.1073/pnas.0735531100 2013-08-29T11:56:25Z Protein, mtDNA, and nuclear microsatellite DNA analyses have demonstrated that the Yellowstone grizzly bear has low levels of genetic variability compared with other Ursus arctos populations. Researchers have attributed this difference to inbreeding during a century of anthropogenic isolation and population size reduction. We test this hypothesis and assess the seriousness of genetic threats by generating microsatellite data for 110 museum specimens collected between 1912 and 1981. A loss of variability is detected, but it is much less severe than hypothesized. Variance in allele frequencies over time is used to estimate an effective population size of ≈80 across the 20th century and >100 currently. The viability of the population is unlikely to be substantially reduced by genetic factors in the next several generations. However, gene flow from outside populations will be beneficial in avoiding inbreeding and the erosion of genetic diversity in the future. Text Ursus arctos PubMed Central (PMC) Proceedings of the National Academy of Sciences 100 7 4334 4339 |
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English |
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Biological Sciences |
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Biological Sciences Miller, Craig R. Waits, Lisette P. The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation |
topic_facet |
Biological Sciences |
description |
Protein, mtDNA, and nuclear microsatellite DNA analyses have demonstrated that the Yellowstone grizzly bear has low levels of genetic variability compared with other Ursus arctos populations. Researchers have attributed this difference to inbreeding during a century of anthropogenic isolation and population size reduction. We test this hypothesis and assess the seriousness of genetic threats by generating microsatellite data for 110 museum specimens collected between 1912 and 1981. A loss of variability is detected, but it is much less severe than hypothesized. Variance in allele frequencies over time is used to estimate an effective population size of ≈80 across the 20th century and >100 currently. The viability of the population is unlikely to be substantially reduced by genetic factors in the next several generations. However, gene flow from outside populations will be beneficial in avoiding inbreeding and the erosion of genetic diversity in the future. |
format |
Text |
author |
Miller, Craig R. Waits, Lisette P. |
author_facet |
Miller, Craig R. Waits, Lisette P. |
author_sort |
Miller, Craig R. |
title |
The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation |
title_short |
The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation |
title_full |
The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation |
title_fullStr |
The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation |
title_full_unstemmed |
The history of effective population size and genetic diversity in the Yellowstone grizzly (Ursus arctos): Implications for conservation |
title_sort |
history of effective population size and genetic diversity in the yellowstone grizzly (ursus arctos): implications for conservation |
publisher |
The National Academy of Sciences |
publishDate |
2003 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC153093 http://www.ncbi.nlm.nih.gov/pubmed/12655042 https://doi.org/10.1073/pnas.0735531100 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC153093 http://www.ncbi.nlm.nih.gov/pubmed/12655042 http://dx.doi.org/10.1073/pnas.0735531100 |
op_rights |
Copyright © 2003, The National Academy of Sciences |
op_doi |
https://doi.org/10.1073/pnas.0735531100 |
container_title |
Proceedings of the National Academy of Sciences |
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100 |
container_issue |
7 |
container_start_page |
4334 |
op_container_end_page |
4339 |
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1766231360007045120 |