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Genetic diversity of the siberian stone pine under introduction in the South Urals and Bashkir Cis-Urals  [2016]

Shigapov, Z.Kh. Putenikhina, K.V. Shigapova, A.I. Urazbakhtina, K.A. et al.

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Allozyme polymorphism of Siberian stone pine (Pinus sibirica Du Tour) has been studied in 14 artificial stands in the South Urals and Bashkir Cis-Urals on the basis of a 7 gene-enzyme system analysis. The following values of genetic diversity are determined: mean number of alleles per locus (A) constitutes 1.69±0.08; portion of polymorphic loci (P99) – 50.0%; the average expected heterozygosity (He) – 0.121±0.015; the average observed heterozygosity (Ho) – 0.127±0.017.The level of genetic variability in artificial stands of Siberian stone pine in the region is somewhat inferior to that in natural populations of the species. The highest genotype heterozygosity is found in high-productive 110 year-old artificial stand in the South Urals (Beloretsky-2 site), and also in Ufimsky and Mishkinsky sites in the Bashkir Cis-Ural region. The lowest heterozygosity values are revealed in the Birsky and Tuimazinsky sites characterized by the weakened vital state of individuals. In total it can be said about the maintenance of essential parts of the species' genetic polymorphism under introduction, especially in some stands. Genetic similarity of the studied stands is shown: inter-sample component of the total genetic diversity (FST) constitutes 2.2%, the average Nei's genetic distance (D) – 0.0033±0.00023, which is also characteristic of the natural populations of Siberian stone pine in the species range. The obtained data about the genetic variability level of artifici
al stands in a complex with forestry characteristics give evidence of the successful species introduction in the region and the necessity of resumption of works on Siberian stone pine culture establishment in an industrial scale.

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Siberian Journal of Forest Science

ISSN : 2311-1410