Genetic Structure and Geographical Differentiation of Larix sibirica Ledeb. in the Urals

Nikita Chertov, Yulia Vasilyeva , Andrei Zhulanov, Yulia Nechaeva , Svetlana Boronnikova, Ruslan Kalendar

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Abstract

The Ural Mountains and the West Eurasian Taiga forests are one of the most important centres of genetic diversity for Larix sibirica Ledeb. Forest fragmentation negatively impacts forest ecosystems, especially due to the impact of their intensive use on the effects of climate change. For the preservation and rational use of forest genetic resources, it is necessary to carefully investigate the genetic diversity of the main forest-forming plant species. The Larix genus species are among the most widespread woody plants in the world. The Siberian larch (Larix sibirica, Pinaceae) is found in the forest, forest-tundra, tundra (Southern part), and forest-steppe zones of the North, Northeast, and partly East of the European part of Russia and in Western and Eastern Siberia; in the Urals, the Siberian larch is distributed fragmentarily. In this study, eight pairs of simple sequence repeat (SSR) primers were used to analyse the genetic diversity and population structure of 15 Siberian larch samples in the Urals. Natural samples in the Urals exhibit indicators of genetic diversity comparable to those of Siberia populations (expected heterozygosity, He = 0.623; expected number of alleles, Ne = 4017; observed heterozygosity, Ho = 0.461). Genetic structure analysis revealed that the examined samples are relatively highly differentiated (Fst = 0.089). Using various algorithms for determining the spatial genetic structure, the examined samples formed three groups according to geographical location. The data obtained are required for the development of species conservation and restoration programs, which are especially important in the Middle Urals, which is the region with strong forest fragmentation.
Original languageEnglish
Article number1401
JournalForests
Volume12
Issue number10
DOIs
Publication statusPublished - Oct 14 2021

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