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Fine-scale spatial genetic structure in a multi-oak-species (Quercus spp.) forest

Alexandru Lucian Curtu (1)   , Iacob Craciunesc (1), Cristian Mihai Enescu (1-2), Amaryllis Vidalis (3), Nicolae Sofletea (1)

iForest - Biogeosciences and Forestry, Volume 8, Issue 3, Pages 324-332 (2015)
doi: https://doi.org/10.3832/ifor1150-007
Published: Sep 05, 2014 - Copyright © 2015 SISEF

Research Articles


Patterns of fine-scale spatial distribution of multilocus genotypes can provide valuable insights into the biology of forest tree species. Here we tested for the existence of spatial genetic structure (SGS) in a four-oak-species forest with contrasting species abundances and hybridization rates. A total of 483 adult trees were mapped over 8.6 ha and genotyped using 10 highly polymorphic genomic regions. A weak but significant SGS was observed in each of the four oak species, with Quercus frainetto, the species with the lowest density in the sampling plot, exhibiting the strongest SGS. The values of the Sp statistic were 0.0033, 0.0035, 0.0042, and 0.0098 for Q. petraea, Q. robur, Q. pubescens, and Q. frainetto, respectively. The spatial correlogram of the total population was significantly different when hybrids were removed from the analysis, which suggests that hybridization influenced the SGS. Interspecific SGSs were significantly correlated with the rates of hybridization. Implications of the obtained results for the conservation and management of forest genetic resources are discussed.

  Keywords


Spatial Genetic Structure, Quercus, Oak Species, Population Density, Hybridization

Authors’ address

(1)
Alexandru Lucian Curtu
Iacob Craciunesc
Cristian Mihai Enescu
Nicolae Sofletea
Department of Forest Sciences, Transilvania University of Brasov, Sirul Beethoven-1, 500123 Brasov (Romania)
(2)
Cristian Mihai Enescu
Department of Soil Sciences, University of Agronomic Sciences and Veterinary Medicine of Bucharest (Romania)
(3)
Amaryllis Vidalis
Umeå Plant Science Centre, Department of Ecology and Environmental Science, SE-901 87 Umeå (Sweden)

Corresponding author

 
Alexandru Lucian Curtu
lucian.curtu@unitbv.ro

Citation

Curtu AL, Craciunesc I, Enescu CM, Vidalis A, Sofletea N (2015). Fine-scale spatial genetic structure in a multi-oak-species (Quercus spp.) forest. iForest 8: 324-332. - doi: 10.3832/ifor1150-007

Academic Editor

Andrea Piotti

Paper history

Received: Oct 14, 2013
Accepted: Aug 23, 2014

First online: Sep 05, 2014
Publication Date: Jun 01, 2015
Publication Time: 0.43 months

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