Molecular population genetics of the southern elephant seal Mirounga leonina.
Southern elephant seals breed on sub-Antarctic islands and have a circumpolar distribution. We assayed mitochondrial DNA (mtDNA) and nuclear DNA (nDNA) variation in the three main populations in the south Atlantic, south Indian, and south Pacific oceans, and a smaller continental population in South...
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ftpubmed:oai:pubmedcentral.nih.gov:1460292 2023-05-15T14:04:52+02:00 Molecular population genetics of the southern elephant seal Mirounga leonina. Slade, R W Moritz, C Hoelzel, A R Burton, H R 1998-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1460292 http://www.ncbi.nlm.nih.gov/pubmed/9691049 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1460292 http://www.ncbi.nlm.nih.gov/pubmed/9691049 Research Article Text 1998 ftpubmed 2013-08-31T01:28:35Z Southern elephant seals breed on sub-Antarctic islands and have a circumpolar distribution. We assayed mitochondrial DNA (mtDNA) and nuclear DNA (nDNA) variation in the three main populations in the south Atlantic, south Indian, and south Pacific oceans, and a smaller continental population in South America. Population structure of mtDNA was strong and not consistent with isolation by distance. The nDNA loci, although less informative, were consistent with the mtDNA results. Geographic structure appears to be dominated by historical processes, not contemporary gene flow. Uncorrected levels of nucleotide diversity for mtDNA control region I (2.86%) and nDNA (0.09%) were similar to those in humans and mice. Mutation rates for control region I (75 x 10(-9) substitutions per site per year) and nDNA (1.23 x 10(-9)) were similar to those in other mammals. Female effective population size and total effective population size were roughly equal at approximately 4 x 10(4), indicating a twofold greater rate of drift for mtDNA. Effective breeding sex ratio of four to five females per male was estimated from nucleotide diversity and mutation rates for mtDNA and nDNA, and was much less than behavioral observations would suggest. There was no evidence for selection at any of the assayed loci. Text Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals PubMed Central (PMC) Antarctic Pacific Indian |
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Research Article Slade, R W Moritz, C Hoelzel, A R Burton, H R Molecular population genetics of the southern elephant seal Mirounga leonina. |
topic_facet |
Research Article |
description |
Southern elephant seals breed on sub-Antarctic islands and have a circumpolar distribution. We assayed mitochondrial DNA (mtDNA) and nuclear DNA (nDNA) variation in the three main populations in the south Atlantic, south Indian, and south Pacific oceans, and a smaller continental population in South America. Population structure of mtDNA was strong and not consistent with isolation by distance. The nDNA loci, although less informative, were consistent with the mtDNA results. Geographic structure appears to be dominated by historical processes, not contemporary gene flow. Uncorrected levels of nucleotide diversity for mtDNA control region I (2.86%) and nDNA (0.09%) were similar to those in humans and mice. Mutation rates for control region I (75 x 10(-9) substitutions per site per year) and nDNA (1.23 x 10(-9)) were similar to those in other mammals. Female effective population size and total effective population size were roughly equal at approximately 4 x 10(4), indicating a twofold greater rate of drift for mtDNA. Effective breeding sex ratio of four to five females per male was estimated from nucleotide diversity and mutation rates for mtDNA and nDNA, and was much less than behavioral observations would suggest. There was no evidence for selection at any of the assayed loci. |
format |
Text |
author |
Slade, R W Moritz, C Hoelzel, A R Burton, H R |
author_facet |
Slade, R W Moritz, C Hoelzel, A R Burton, H R |
author_sort |
Slade, R W |
title |
Molecular population genetics of the southern elephant seal Mirounga leonina. |
title_short |
Molecular population genetics of the southern elephant seal Mirounga leonina. |
title_full |
Molecular population genetics of the southern elephant seal Mirounga leonina. |
title_fullStr |
Molecular population genetics of the southern elephant seal Mirounga leonina. |
title_full_unstemmed |
Molecular population genetics of the southern elephant seal Mirounga leonina. |
title_sort |
molecular population genetics of the southern elephant seal mirounga leonina. |
publishDate |
1998 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1460292 http://www.ncbi.nlm.nih.gov/pubmed/9691049 |
geographic |
Antarctic Pacific Indian |
geographic_facet |
Antarctic Pacific Indian |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1460292 http://www.ncbi.nlm.nih.gov/pubmed/9691049 |
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1766276255196381184 |