Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland
The effective conservation of species requires data on the levels and distribution of genetic diversity within and among populations. In this study, we estimated the genetic variation in three isolated populations of Betula nana in Poland. An analysis of 11 nuclear microsatellites revealed moderate...
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ftdoajarticles:oai:doaj.org/article:5cef4162df40463681306cdde2d5bcdf 2023-05-15T15:44:26+02:00 Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland Jadwiszczak, Katarzyna Drzymulska, Danuta Banaszek, Agata Jadwiszczak, Piotr 2012-01-01T00:00:00Z https://doi.org/10.14214/sf.905 https://doaj.org/article/5cef4162df40463681306cdde2d5bcdf EN eng Finnish Society of Forest Science https://www.silvafennica.fi/article/905 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.905 https://doaj.org/article/5cef4162df40463681306cdde2d5bcdf Silva Fennica, Vol 46, Iss 4 (2012) Forestry SD1-669.5 article 2012 ftdoajarticles https://doi.org/10.14214/sf.905 2022-12-31T08:49:48Z The effective conservation of species requires data on the levels and distribution of genetic diversity within and among populations. In this study, we estimated the genetic variation in three isolated populations of Betula nana in Poland. An analysis of 11 nuclear microsatellites revealed moderate mean heterozygosities (H=0.556, H=0.562), low mean number of alleles per locus (A=4.57) and no inbreeding in the total sample. An M-ratio test indicated that each population had experienced a severe bottleneck in the past. Tests for heterozygosity excess revealed that a significant decrease in the numbers of individuals in two populations had occurred quite recently. The large number of private alleles and very restricted number of migrants between populations (Nm=0.35) strongly suggest that genetic drift and geographic isolation are the primary factors responsible for the reduction of genetic variation in the Polish populations of B. nana. We detected two cpDNA haplotypes in the study populations, which can be explained in terms of either the genetic drift acting on the relict localities or a postglacial recolonisation from distinct refugia. Palynological data indicated that one refugium could be located in the Carpathians and their northern foreland. The primary threat to B. nana in Poland is the overgrowth of its habitats by competing species, which has likely resulted in a lack of generative reproduction in the mountain populations.OE Article in Journal/Newspaper Betula nana Directory of Open Access Journals: DOAJ Articles Silva Fennica 46 4 |
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Forestry SD1-669.5 |
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Forestry SD1-669.5 Jadwiszczak, Katarzyna Drzymulska, Danuta Banaszek, Agata Jadwiszczak, Piotr Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland |
topic_facet |
Forestry SD1-669.5 |
description |
The effective conservation of species requires data on the levels and distribution of genetic diversity within and among populations. In this study, we estimated the genetic variation in three isolated populations of Betula nana in Poland. An analysis of 11 nuclear microsatellites revealed moderate mean heterozygosities (H=0.556, H=0.562), low mean number of alleles per locus (A=4.57) and no inbreeding in the total sample. An M-ratio test indicated that each population had experienced a severe bottleneck in the past. Tests for heterozygosity excess revealed that a significant decrease in the numbers of individuals in two populations had occurred quite recently. The large number of private alleles and very restricted number of migrants between populations (Nm=0.35) strongly suggest that genetic drift and geographic isolation are the primary factors responsible for the reduction of genetic variation in the Polish populations of B. nana. We detected two cpDNA haplotypes in the study populations, which can be explained in terms of either the genetic drift acting on the relict localities or a postglacial recolonisation from distinct refugia. Palynological data indicated that one refugium could be located in the Carpathians and their northern foreland. The primary threat to B. nana in Poland is the overgrowth of its habitats by competing species, which has likely resulted in a lack of generative reproduction in the mountain populations.OE |
format |
Article in Journal/Newspaper |
author |
Jadwiszczak, Katarzyna Drzymulska, Danuta Banaszek, Agata Jadwiszczak, Piotr |
author_facet |
Jadwiszczak, Katarzyna Drzymulska, Danuta Banaszek, Agata Jadwiszczak, Piotr |
author_sort |
Jadwiszczak, Katarzyna |
title |
Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland |
title_short |
Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland |
title_full |
Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland |
title_fullStr |
Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland |
title_full_unstemmed |
Population history, genetic variation and conservation status of the endangered birch species Betula nana L. in Poland |
title_sort |
population history, genetic variation and conservation status of the endangered birch species betula nana l. in poland |
publisher |
Finnish Society of Forest Science |
publishDate |
2012 |
url |
https://doi.org/10.14214/sf.905 https://doaj.org/article/5cef4162df40463681306cdde2d5bcdf |
genre |
Betula nana |
genre_facet |
Betula nana |
op_source |
Silva Fennica, Vol 46, Iss 4 (2012) |
op_relation |
https://www.silvafennica.fi/article/905 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.905 https://doaj.org/article/5cef4162df40463681306cdde2d5bcdf |
op_doi |
https://doi.org/10.14214/sf.905 |
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Silva Fennica |
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46 |
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4 |
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1766378774756065280 |