The relationship between the Scots pine and Norway spruce plants safety and the genetic diversity level on main quantitative characteristics
2019
Bondarenko, A.S.
The increasing role of selective planting material in reforestation requires close attention to the level of genetic diversity and stability of main forest-forming species stands created by forest breeding seeds. Currently, against the background of climate change and the increasing impact of human activity on the natural environment, such studies are of environmental importance, as well as of direct practical interest. The aim of the work is to assess the level of relationship between the Scots pine and Norway spruce plants safety and the genetic main quantitative characteristics diversity level. According to the results genotype has a significant impact on the plant safety, population structure and maintaining diversity in forest stands. For conservation of the stand sustainability is required to maintain a sufficiently high level of genetic diversity. Various Scots pine and Norway spruce families differ in the rate of the main biometric parameters distribution changing. This confirms the influence of genetic factors on the processes of self-thinning forest stands. The pressure of natural selection changes the genetic composition of the forest stands. The lowest value of genetic diversity is typical for a group of families with minimal plant safety. For decreasing the loss of rare genotypes in the early stages of ontogenesis, measures aimed at reducing the level of competition are recommended, primarily on the basis of the stand density regulating. Influencing of genetic factors on distribution curve for main biometric parameters are marked.
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