Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism
Research Highlights: We detected the longitudinal gradients of genetic diversity parameters, such as the number of alleles, effective number of alleles, heterozygosity, and inbreeding coefficient, and found that these might be attributable to climatic conditions, such as temperature and snow depth....
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ftmdpi:oai:mdpi.com:/1999-4907/11/2/233/ 2023-08-20T04:09:30+02:00 Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism Keiko Kitamura Kentaro Uchiyama Saneyoshi Ueno Wataru Ishizuka Ikutaro Tsuyama Susumu Goto agris 2020-02-20 application/pdf https://doi.org/10.3390/f11020233 EN eng Multidisciplinary Digital Publishing Institute Genetics and Molecular Biology https://dx.doi.org/10.3390/f11020233 https://creativecommons.org/licenses/by/4.0/ Forests; Volume 11; Issue 2; Pages: 233 central-marginal hypothesis cline Pinaceae trailing edge population Sakhalin fir sub-boreal forest Text 2020 ftmdpi https://doi.org/10.3390/f11020233 2023-07-31T23:08:21Z Research Highlights: We detected the longitudinal gradients of genetic diversity parameters, such as the number of alleles, effective number of alleles, heterozygosity, and inbreeding coefficient, and found that these might be attributable to climatic conditions, such as temperature and snow depth. Background and Objectives: Genetic diversity among local populations of a plant species at its distributional margin has long been of interest in ecological genetics. Populations at the distribution center grow well in favorable conditions, but those at the range margins are exposed to unfavorable environments, and the environmental conditions at establishment sites might reflect the genetic diversity of local populations. This is known as the central-marginal hypothesis in which marginal populations show lower genetic variation and higher differentiation than in central populations. In addition, genetic variation in a local population is influenced by phylogenetic constraints and the population history of selection under environmental constraints. In this study, we investigated this hypothesis in relation to Abies sachalinensis, a major conifer species in Hokkaido. Materials and Methods: A total of 1189 trees from 25 natural populations were analyzed using 19 EST-SSR loci. Results: The eastern populations, namely, those in the species distribution center, showed greater genetic diversity than did the western peripheral populations. Another important finding is that the southwestern marginal populations were genetically differentiated from the other populations. Conclusions: These differences might be due to genetic drift in the small and isolated populations at the range margin. Therefore, our results indicated that the central-marginal hypothesis held true for the southernmost A. sachalinensis populations in Hokkaido. Text Sakhalin MDPI Open Access Publishing Forests 11 2 233 |
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MDPI Open Access Publishing |
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ftmdpi |
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English |
topic |
central-marginal hypothesis cline Pinaceae trailing edge population Sakhalin fir sub-boreal forest |
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central-marginal hypothesis cline Pinaceae trailing edge population Sakhalin fir sub-boreal forest Keiko Kitamura Kentaro Uchiyama Saneyoshi Ueno Wataru Ishizuka Ikutaro Tsuyama Susumu Goto Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism |
topic_facet |
central-marginal hypothesis cline Pinaceae trailing edge population Sakhalin fir sub-boreal forest |
description |
Research Highlights: We detected the longitudinal gradients of genetic diversity parameters, such as the number of alleles, effective number of alleles, heterozygosity, and inbreeding coefficient, and found that these might be attributable to climatic conditions, such as temperature and snow depth. Background and Objectives: Genetic diversity among local populations of a plant species at its distributional margin has long been of interest in ecological genetics. Populations at the distribution center grow well in favorable conditions, but those at the range margins are exposed to unfavorable environments, and the environmental conditions at establishment sites might reflect the genetic diversity of local populations. This is known as the central-marginal hypothesis in which marginal populations show lower genetic variation and higher differentiation than in central populations. In addition, genetic variation in a local population is influenced by phylogenetic constraints and the population history of selection under environmental constraints. In this study, we investigated this hypothesis in relation to Abies sachalinensis, a major conifer species in Hokkaido. Materials and Methods: A total of 1189 trees from 25 natural populations were analyzed using 19 EST-SSR loci. Results: The eastern populations, namely, those in the species distribution center, showed greater genetic diversity than did the western peripheral populations. Another important finding is that the southwestern marginal populations were genetically differentiated from the other populations. Conclusions: These differences might be due to genetic drift in the small and isolated populations at the range margin. Therefore, our results indicated that the central-marginal hypothesis held true for the southernmost A. sachalinensis populations in Hokkaido. |
format |
Text |
author |
Keiko Kitamura Kentaro Uchiyama Saneyoshi Ueno Wataru Ishizuka Ikutaro Tsuyama Susumu Goto |
author_facet |
Keiko Kitamura Kentaro Uchiyama Saneyoshi Ueno Wataru Ishizuka Ikutaro Tsuyama Susumu Goto |
author_sort |
Keiko Kitamura |
title |
Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism |
title_short |
Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism |
title_full |
Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism |
title_fullStr |
Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism |
title_full_unstemmed |
Geographical Gradients of Genetic Diversity and Differentiation among the Southernmost Marginal Populations of Abies sachalinensis Revealed by EST-SSR Polymorphism |
title_sort |
geographical gradients of genetic diversity and differentiation among the southernmost marginal populations of abies sachalinensis revealed by est-ssr polymorphism |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/f11020233 |
op_coverage |
agris |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
Forests; Volume 11; Issue 2; Pages: 233 |
op_relation |
Genetics and Molecular Biology https://dx.doi.org/10.3390/f11020233 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/f11020233 |
container_title |
Forests |
container_volume |
11 |
container_issue |
2 |
container_start_page |
233 |
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1774722505314926592 |