What question did this study set out to answer?

This research aims to investigate the genetic diversity and geographical distribution of Saccharomyces paradoxus yeast strains in Siberia.

February 27, 2026

Intraspecific Polymorphism of Saccharomyces paradoxus Yeasts: Geographical Populations

Puntos clave

This research aims to investigate the genetic diversity and geographical distribution of Saccharomyces paradoxus yeast strains in Siberia.
Isolation of 28 Saccharomyces strains from Quercus robur bark and soil.
Sequencing of D1/D2 domain and ITS1 region of rDNA for identification.
Multigene phylogenetic analysis of nuclear genes (NEJ1, EST2, HDF1, HDF2).
Three strains identified as S. cerevisiae; the rest as S. paradoxus.
West Siberian strains show genetic affiliation with the European S. paradoxus population.
A geographical boundary between European and Far Eastern populations is indicated to lie east of Tomsk Oblast.

Resumen

In the Siberian Botanical Garden of Tomsk State University, 28 strains of Saccharomyces yeasts were isolated from the bark of Quercus robur and the soil beneath them. Based on the sequencing of the D1/D2 domain and the ITS1 region of rDNA, three strains were assigned to the species S. cerevisiae, and the rest to the species S. paradoxus. Using multigene phylogenetic analysis of nuclear genes (NEJ1, EST2, HDF1, HDF2), the genetic relationship of West Siberian strains of S. paradoxus with European, Far Eastern, North American and Hawaiian populations was studied. According to the results obtained, the West Siberian strains belong to the European population. Apparently, the border between the European and Far Eastern populations of S. paradoxus lies east of Tomsk Oblast.

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