Genetic diversity and differentiation of siberian stone pine populations at the southern edge in lowland part of West Siberia

Abstract

Background. Siberian Stone pine (Pinus sibirica Du Tour) is one of the major forest-forming species at West Siberia. Climate change and anthropogenic impact lead to reduction of Siberian stone pine forests at the southern limit of distribution in lowland part of the species range. Materials and methods. Five Siberian Stone pine stands from the trailing edge in transit zone between southern taiga and forest-steppe in West Siberia were studied. Genotypes of 104 trees on 25 allozyme loci coding for 15 enzymes were determined using starch gel electrophoresis. Results. We evaluated genetic diversity, differentiation and population subdivision of Siberian Stone pine from the trailing edge in West Siberia. About 2 % of total genetic diversity was related with differences between populations (FST = 0,021). Conclusions. In our study at the southern limit of distribution in lowland part of Siberian Stone pine range there is no indication of genetic depauperation and increased differentiation in small isolated stands due to recent climate change and anthropogenic impact.

Genetic diversity and structure of Siberian Stone Pine (Pinus sibirica Du Tour) populations

“…The AMOVA results showed that only 2 % of the total genetic variation occurred among populations. Low differentiation among Siberian stone pine populations revealed in this study is in line with previous reports on Siberian stone pine using allozyme and nuclear simple sequence repeat (nSSR) markers (Petrova et al, 2014;Shuvaev and Ibe, 2021).…”