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Genetic diversity of Betula nana in Sweden and conservation implications for protection of relict Polish populations

Grażyna B. Dąbrowska
Grażyna B. Dąbrowska
, 
Henryk P. Dąbrowski
Henryk P. Dąbrowski
 et 
Iwona Szyp-Borowska
Iwona Szyp-Borowska
   | 19 sept. 2021
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Article Category: Original Article
Publié en ligne: 19 sept. 2021
Pages: 225 - 231
Reçu: 25 févr. 2021
Accepté: 28 avr. 2021
DOI: https://doi.org/10.2478/ffp-2021-0023
© 2021 Grażyna B. Dąbrowska, Henryk P. Dąbrowski, Iwona Szyp-Borowska, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Geographical location of the Betula nana L. populations studied in this work: 1 – Abisko, 2 – Gällivare, 3 – Storlien, 4 – Malbo, 5 – The Linje Reserve. The grey area expresses the range of distribution of B. nana (Kruszelnicki and Fabiszewski 2001, modified)
Geographical location of the Betula nana L. populations studied in this work: 1 – Abisko, 2 – Gällivare, 3 – Storlien, 4 – Malbo, 5 – The Linje Reserve. The grey area expresses the range of distribution of B. nana (Kruszelnicki and Fabiszewski 2001, modified)

Figure 2

Principal coordinates analysis (PCoA) using random amplification of polymorphic DNA (RAPD) data of the studied populations of Betula nana
Principal coordinates analysis (PCoA) using random amplification of polymorphic DNA (RAPD) data of the studied populations of Betula nana

Figure 3

Dendrogram based on Unweighted Pair Group Method with Arithmetic average (UPGMA) of random amplification of polymorphic DNA (RAPD) profiles, showing the relationships among the four Swedish populations of Betula nana
Dendrogram based on Unweighted Pair Group Method with Arithmetic average (UPGMA) of random amplification of polymorphic DNA (RAPD) profiles, showing the relationships among the four Swedish populations of Betula nana

Genetic diversity within populations and genetic differentiation parameters of analysed populations of Betula nana

Population P (%) Na Ne I He
Abisko 52.5 1.325 1.265 0.259 0.167
Malbo 72.5 1.675 1.458 0.396 0.265
Storlien 52.5 1.300 1.177 0.200 0.121
Gällivare 30.0 0.900 1.090 0.111 0.066
Mean 51.9 1.300 1.245 0.242 0.155
Linje 66.7 1.333 1.256 0.290 0.179

Range of length and number of DNA fragments of Betula nana determined by RAPD

Primer name Number of polymorphic DNA fragments Size range of polymorphic DNA fragments (bp)
OPA09 14 90–900
OPC14 12 90–1030
OPC02 16 120–1200

Summary of genetic diversity statistics for all loci in relation to the geographic location of Betula nana populations in the north and south of Sweden

Ht Hs Gst Nm
All populations 0.2240 0.1548 0.3171 1.100
Abisko/Gällivare 0.1428 0.1166 0.1800 2.220
Malbo/Storlien 0.2559 0.1930 0.2460 1.532

Results of an AMOVA showing the distribution of genetic variation among Betula nana populations and within populations based on RAPD

Source of variations Degree of freedom Sum of squares Variance components % of total variance P value
Among populations 3 126.738 1.912 32 <0.001
Within populations 76 304.350 4.005 68 <0.001
Total 79 431.088 5.917 100
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