Determination of genetic diversity in salix caprea populations from the Coruh river watershed

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2017

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Tokdemir, Yasin

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The genus willow (Salicaceae) has around 500 species worldwide, 27 species naturally distributed in Turkey. Goat willow (Salix caprea) is an ecologically important, cold tolerant pioneer species which spreads in Europe and western and central Asia, in the Mediterranean Sea, central Anatolia and Black Sea regions in Turkey. It is also naturally distributed through Coruh river banks. Hydroelectric dam plant dams are being built in these regions which endanger this species. Some of the Salix caprea populations would be under water in near future. Beside this, hydroelectric plants may change local climate which would affect Salix caprea negatively by increasing average annual temperature. Moreover, there have been genetic diversity studies in Europe about Salix caprea species by using SSR markers, but there has been no study related with genetic diversity assessment of this species in Turkey yet. Therefore, it is important to determine the genetic diversity of Salix caprea populations in the eastern Black Sea Region. To characterize genetic diversity of Salix caprea species, 180 genotypes were analyzed by using 10 microsatellite markers. The number of observed alleles ranged from 3.500 to 5.600 and average mean value was 4.770. The observed heterozygosity vi ranged from 0.082 to 1.000 and average mean value was 0.503 while expected heterozygosity ranged from 0.119 to 0.827 and average mean value was 0.538. % 7.5 genetic variation was between populations and % 92.5 genetic variations were within populations. When Salix caprea populations were evaluated according to their genetic relations, two separate groups were formed; one group included populations in the Trabzon region and the other group included populations in the Artvin region. In the current study, magnitude and pattern of genetic diversity of Salix caprea were determined successfully. Populations had moderate level of genetic diversity. Construction of dams in these regions might endanger genetic resources of Salix caprea in near future.

Subject Keywords

Willows., Salicaceae., Salix caprea., Biodiversity., Watershed ecology., Microsatellites (Genetics).

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http://etd.lib.metu.edu.tr/upload/12621226/index.pdf
https://hdl.handle.net/11511/26730

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Y. Tokdemir, “Determination of genetic diversity in salix caprea populations from the Coruh river watershed,” M.S. - Master of Science, Middle East Technical University, 2017.