Тип публикации: статья из журнала
Год издания: 2020
Идентификатор DOI: 10.1134/S1995425520060116
Ключевые слова: genetic diversity, heterozygosity, kuznetsk alatau, microsatellites, pinus sibirica
Аннотация: Abstract: The DNA polymorphism of seven coenopopulations of Siberian stone pine (Pinus sibirica Du Tour) growing in a region which is typical for mountain taiga pine forests—the northeastern part of the Kuznetsk Alatau—has been studied. According to the data of 11 nuclear microsatellite loci, 44 allelic variants which significantlyПоказать полностьюdiffered between the studied coenopopulations in composition and frequency of occurrence are identified. The highest level of allelic diversity is found in the Ps_80612 and Ps_1502048 loci, in which eight and seven alleles are detected, respectively. The calculation of the main parameters of genetic diversity have shown, on the whole, a relatively low level of polymorphism of the studied samples (NA = 3.078, NE = 1.877, HE = 0.445, and HO = 0.401). An analysis of the degree of subdivision of coenopopulations has revealed that about 95% of the total genetic diversity is concentrated within populations, while the interpopulation component accounts for only about 5% (FST = 0.049). The diagnosed differences in the level of P. sibirica genetic polymorphism are determined by several factors: the presence of orographic and phytocenotic barriers between the coenopopulations, which define the directions of seed propagation vectors along the watercourses of river basins that form the Chulym River in the eastern sector of the Kuznetsk Alatau and Tom River in the western sector; a significant level of bioclimatic and environmental extremeness of habitats of coenopopulations in accordance with the height above sea level; and anthropogenic pressure, including periodic deforestation and recreational impact on coenopopulations located near settlements. These factors, which have a significant microevolutionary component, determine the adaptation trends of coenopopulations of P. sibirica and morphological singularities and reproductive potential of trees and, ultimately, they control their genetic polymorphism in the studied part of the Kuznetsk Alatau. © 2020, Pleiades Publishing, Ltd.
Журнал: Contemporary Problems of Ecology
Выпуск журнала: Vol. 13, Is. 6
Номера страниц: 569-576
ISSN журнала: 19954255
Издатель: Pleiades journals