ASSESSMENT OF THE CLONE PROGENY OF THE PLUS TREES OF THE SCOTS PINE IN THE NORTH OF THE KAZAKH MELKOSOPOCHNIK

Abstract

The research was carried out in the archive of clones of plus trees of Scots pine, located in the north
of the Kazakh upland in the Akmola region. The purpose of the research is to identify economically valuable
clones based on the testing of trees in the clone archive and recommend them for the creation of forest seed
plantations. The article provides an assessment of clones of Pinus sylvestris L. by breeding categories –
fast-growing, medium-growing and slow-growing. The breeding categories of clones were established based
on the results of many years of research in the archive of clones of plus trees. In addition to the rapid growth
of trees in height, their condition was assessed. Clones differing in height from the average slope value were
identified, the Student's T-criterion was determined for them, the reliability of which was proved at the
significance level of 0.01. To establish age-related changes in the height and diameter of the trunk, an index
evaluation of clones was carried out. Ranking of clones by height and trunk diameter showed that 46,7% of
clones had the same or similar ranks, both in height and trunk diameter. Clones of scots pine with a
significant advantage in height over the average slope value and with a high assessment of their condition,
which are recommended for the creation of seed plantations, have been identified.