The effect of population density on gene flow between adult trees and the seedling bank in Abies alba Mill

Jarosław Paluch , Marcin Zarek , Marta Kempf

Abstract

Populations of smaller efective sizes or subjected to strong environmental fltering have a higher risk of stochastic changes in their genetic properties. This study tested the hypothesis that reducing the density of parent trees combined with environmental fltering during the stage of regeneration establishment afects gene fow between the parent and ofspring populations of Abies alba Mill. The genetic variation and spatial genetic structure of parent trees and seedlings were compared in the Western Carpathians (southern Poland) in 27 stands with varying adult tree and regeneration densities. The analysis comprised 1592 individuals and was based on fve nuclear microsatellite markers. The proportion of stands with signifcant spatial genetic structure in the adult tree and seedling cohorts increased as the density of adult trees decreased. The genetic diferentiation between adult trees and seedlings expressed by the fxation index FST was between 0.005 and 0.021 and increased as the density of adult trees decreased but was not correlated with the seedling abundance. At the within-stand level, the analysis revealed shifts in the average number of alleles per locus (between − 15% and + 28%), the observed heterozygosity (between − 25% and + 20%) and expected heterozygosity (between − 8% and + 11%) between the populations of adult trees and seedlings. It was concluded that in mixed stands with densities of A. alba trees about 50 adult individuals per ha, there may be some risk of reduced efective population size and disturbed vertical gene fow, but signifcant shifts in the level of genetic variation are less likely.
Author Jarosław Paluch (FoF / IoEaS / DoDFB)
Jarosław Paluch,,
- DEPARTMENT OF DETAILED FOREST BREEDING
, Marcin Zarek (FoF / FEPI / DoFFMaPoT)
Marcin Zarek,,
- DEPARTMENT OF FOREST FITOPATOLOGY, MYKOLOGY AND PHYSIOLOGY OF TREES
, Marta Kempf (FoF / IoEaS / DoGNiSL)
Marta Kempf,,
- DEPARTMENT OF GENETICS, SEEDS AND FOREST NURSERY
Journal seriesEuropean Journal of Forest Research, ISSN 1612-4669, e-ISSN 1612-4677, (N/A 100 pkt)
Issue year2019
Vol138
No2
Pages203-217
Publication size in sheets0.7
Keywords in EnglishNatural regeneration, Mixed forest, Spatial genetic structure, Genetic distance, Genetic isolation, Seed trees
ASJC Classification1107 Forestry; 1110 Plant Science
DOIDOI:10.1007/s10342-019-01162-w
Languageen angielski
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The efect of population density on gene fow between adult trees and the seedling bank in Abies alba Mill of 27-03-2019
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The efect of population density on gene fow between adult trees and the seedling bank in Abies alba Mill
Score (nominal)100
Score sourcejournalList
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.149; WoS Impact Factor: 2018 = 2.354 (2) - 2018=2.629 (5)
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