Genetic diversity structure of populus nigra populations in a major rivers system. what is the role of human impact?

Date

2017-09-22

Author

Çiftci, Asiye
Kaya, Zeki

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Populus nigra is one of the most economically and ecologically important forest trees in Turkey, well known for its rapid growth, good ability to vegetative propagation and the extreme uses of its wood. Due to overexploitation, loss of natural distribution area and extreme hybridization and introgression, Populus nigra is one of the most threatened tree species in Turkey and Europe. Using seventeen nuclear SSR loci, the genetic structure of European black poplar populations along the largest river of Turkey was analyzed. All tested loci were highly polymorphic, displaying 4 to 12 alleles per locus. Observed heterozygosity (overall Ho = 0.79) has been higher than the expected (overall He = 0.54) in each population. Although whole river system is sampled from upstream, middle and downstream systematically, low level of genetic differentiation among three locations (FST= 0, 01) and excess of heterozygotes for each location were found. Human mediated dispersal, phenotypic selection, high level of gene flow and extensive circulations of clonal materials may cause to those situations. The genetic data obtained from this study could provide basis for efficient conservation and restoration of species natural populations in its natural habitat as well as having sustainable breeding and poplar plantations in the future.

Subject Keywords

Populus, Clonal, Loci, Allele, Nuclear

URI

https://hdl.handle.net/11511/74735
https://www.iufro.org/fileadmin/material/publications/proceedings-archive/iufro17-abstracts.pdf

Collections

Department of Biology, Conference / Seminar